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Finding the Fourth Proportional to 539,115.20, 807,247.20 and 432,000.80

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Solution

The fourth proportional to 539,115.20, 807,247.20 and 432,000.80 is: 646,858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,115.20 : 807,247.20 = 432,000.80 : x
  2. Step 2: Convert to fraction form
    539,115.20/807,247.20 = 432,000.80/x
  3. Step 3: Cross multiply
    539,115.20x = 807,247.20 × 432,000.80
  4. Step 4: Simplify right side
    539,115.20x = 348,731,436,197.76
  5. Step 5: Solve for x
    x = 348,731,436,197.76/539,115.20
  6. Step 6: Final answer
    x = 646,858.85

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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.