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Finding the Fourth Proportional to 562.40, 843.60 and 472.80

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Solution

The fourth proportional to 562.40, 843.60 and 472.80 is: 709.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.40 : 843.60 = 472.80 : x
  2. Step 2: Convert to fraction form
    562.40/843.60 = 472.80/x
  3. Step 3: Cross multiply
    562.40x = 843.60 × 472.80
  4. Step 4: Simplify right side
    562.40x = 398,854.08
  5. Step 5: Solve for x
    x = 398,854.08/562.40
  6. Step 6: Final answer
    x = 709.20

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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.