Home / 689,982,511.20-1,034,973,766.80-431,702,185.20

Finding the Fourth Proportional to 689,982,511.20, 1,034,973,766.80 and 431,702,185.20

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Solution

The fourth proportional to 689,982,511.20, 1,034,973,766.80 and 431,702,185.20 is: 647,553,277.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,982,511.20 : 1,034,973,766.80 = 431,702,185.20 : x
  2. Step 2: Convert to fraction form
    689,982,511.20/1,034,973,766.80 = 431,702,185.20/x
  3. Step 3: Cross multiply
    689,982,511.20x = 1,034,973,766.80 × 431,702,185.20
  4. Step 4: Simplify right side
    689,982,511.20x = 446,800,436,752,235,200
  5. Step 5: Solve for x
    x = 446,800,436,752,235,200/689,982,511.20
  6. Step 6: Final answer
    x = 647,553,277.80

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Double scale
Find fourth proportional to 689,982,512.20, 1,034,973,768.30 and 431,702,186.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.