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Finding the Fourth Proportional to 539,343.80, 809,015.70 and 371,382.20

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Solution

The fourth proportional to 539,343.80, 809,015.70 and 371,382.20 is: 557,073.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,343.80 : 809,015.70 = 371,382.20 : x
  2. Step 2: Convert to fraction form
    539,343.80/809,015.70 = 371,382.20/x
  3. Step 3: Cross multiply
    539,343.80x = 809,015.70 × 371,382.20
  4. Step 4: Simplify right side
    539,343.80x = 300,454,030,500.54
  5. Step 5: Solve for x
    x = 300,454,030,500.54/539,343.80
  6. Step 6: Final answer
    x = 557,073.30

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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.