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Finding the Fourth Proportional to 517.32, 772.20 and 478.44

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Solution

The fourth proportional to 517.32, 772.20 and 478.44 is: 714.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.32 : 772.20 = 478.44 : x
  2. Step 2: Convert to fraction form
    517.32/772.20 = 478.44/x
  3. Step 3: Cross multiply
    517.32x = 772.20 × 478.44
  4. Step 4: Simplify right side
    517.32x = 369,451.37
  5. Step 5: Solve for x
    x = 369,451.37/517.32
  6. Step 6: Final answer
    x = 714.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.