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Finding the Fourth Proportional to 539,939.80, 809,909.70 and 240,419.80

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Solution

The fourth proportional to 539,939.80, 809,909.70 and 240,419.80 is: 360,629.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,939.80 : 809,909.70 = 240,419.80 : x
  2. Step 2: Convert to fraction form
    539,939.80/809,909.70 = 240,419.80/x
  3. Step 3: Cross multiply
    539,939.80x = 809,909.70 × 240,419.80
  4. Step 4: Simplify right side
    539,939.80x = 194,718,328,092.06
  5. Step 5: Solve for x
    x = 194,718,328,092.06/539,939.80
  6. Step 6: Final answer
    x = 360,629.70

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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.