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Finding the Fourth Proportional to 374.60, 517.38 and 353

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Solution

The fourth proportional to 374.60, 517.38 and 353 is: 487.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.60 : 517.38 = 353 : x
  2. Step 2: Convert to fraction form
    374.60/517.38 = 353/x
  3. Step 3: Cross multiply
    374.60x = 517.38 × 353
  4. Step 4: Simplify right side
    374.60x = 182,635.14
  5. Step 5: Solve for x
    x = 182,635.14/374.60
  6. Step 6: Final answer
    x = 487.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.