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Finding the Fourth Proportional to 374.52, 517.68 and 287.58

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Solution

The fourth proportional to 374.52, 517.68 and 287.58 is: 397.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.52 : 517.68 = 287.58 : x
  2. Step 2: Convert to fraction form
    374.52/517.68 = 287.58/x
  3. Step 3: Cross multiply
    374.52x = 517.68 × 287.58
  4. Step 4: Simplify right side
    374.52x = 148,874.41
  5. Step 5: Solve for x
    x = 148,874.41/374.52
  6. Step 6: Final answer
    x = 397.51

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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.