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Finding the Fourth Proportional to 702,920.20, 1,054,380.30 and 668,513.80

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Solution

The fourth proportional to 702,920.20, 1,054,380.30 and 668,513.80 is: 1,002,770.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,920.20 : 1,054,380.30 = 668,513.80 : x
  2. Step 2: Convert to fraction form
    702,920.20/1,054,380.30 = 668,513.80/x
  3. Step 3: Cross multiply
    702,920.20x = 1,054,380.30 × 668,513.80
  4. Step 4: Simplify right side
    702,920.20x = 704,867,780,998.14
  5. Step 5: Solve for x
    x = 704,867,780,998.14/702,920.20
  6. Step 6: Final answer
    x = 1,002,770.70

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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.