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Finding the Fourth Proportional to 689,890.80, 1,034,836.20 and 606,946.80

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Solution

The fourth proportional to 689,890.80, 1,034,836.20 and 606,946.80 is: 910,420.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,890.80 : 1,034,836.20 = 606,946.80 : x
  2. Step 2: Convert to fraction form
    689,890.80/1,034,836.20 = 606,946.80/x
  3. Step 3: Cross multiply
    689,890.80x = 1,034,836.20 × 606,946.80
  4. Step 4: Simplify right side
    689,890.80x = 628,090,520,114.16
  5. Step 5: Solve for x
    x = 628,090,520,114.16/689,890.80
  6. Step 6: Final answer
    x = 910,420.20

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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.