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Finding the Fourth Proportional to 539,489.40, 809,234.10 and 339,160.20

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Solution

The fourth proportional to 539,489.40, 809,234.10 and 339,160.20 is: 508,740.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,489.40 : 809,234.10 = 339,160.20 : x
  2. Step 2: Convert to fraction form
    539,489.40/809,234.10 = 339,160.20/x
  3. Step 3: Cross multiply
    539,489.40x = 809,234.10 × 339,160.20
  4. Step 4: Simplify right side
    539,489.40x = 274,459,999,202.82
  5. Step 5: Solve for x
    x = 274,459,999,202.82/539,489.40
  6. Step 6: Final answer
    x = 508,740.30

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Half scale
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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.