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Finding the Fourth Proportional to 478.72, 717.36 and 356.44

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Solution

The fourth proportional to 478.72, 717.36 and 356.44 is: 534.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.72 : 717.36 = 356.44 : x
  2. Step 2: Convert to fraction form
    478.72/717.36 = 356.44/x
  3. Step 3: Cross multiply
    478.72x = 717.36 × 356.44
  4. Step 4: Simplify right side
    478.72x = 255,695.80
  5. Step 5: Solve for x
    x = 255,695.80/478.72
  6. Step 6: Final answer
    x = 534.12

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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.