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Finding the Fourth Proportional to 543,319.20, 814,978.80 and 431,344.80

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Solution

The fourth proportional to 543,319.20, 814,978.80 and 431,344.80 is: 647,017.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,319.20 : 814,978.80 = 431,344.80 : x
  2. Step 2: Convert to fraction form
    543,319.20/814,978.80 = 431,344.80/x
  3. Step 3: Cross multiply
    543,319.20x = 814,978.80 × 431,344.80
  4. Step 4: Simplify right side
    543,319.20x = 351,536,867,490.24
  5. Step 5: Solve for x
    x = 351,536,867,490.24/543,319.20
  6. Step 6: Final answer
    x = 647,017.20

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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.