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Finding the Fourth Proportional to 605,140.90, 907,711.35 and 339,720.10

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Solution

The fourth proportional to 605,140.90, 907,711.35 and 339,720.10 is: 509,580.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,140.90 : 907,711.35 = 339,720.10 : x
  2. Step 2: Convert to fraction form
    605,140.90/907,711.35 = 339,720.10/x
  3. Step 3: Cross multiply
    605,140.90x = 907,711.35 × 339,720.10
  4. Step 4: Simplify right side
    605,140.90x = 308,367,790,593.14
  5. Step 5: Solve for x
    x = 308,367,790,593.14/605,140.90
  6. Step 6: Final answer
    x = 509,580.15

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Double scale
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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.