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Finding the Fourth Proportional to 387.38, 533.88 and 358.04

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Solution

The fourth proportional to 387.38, 533.88 and 358.04 is: 493.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.38 : 533.88 = 358.04 : x
  2. Step 2: Convert to fraction form
    387.38/533.88 = 358.04/x
  3. Step 3: Cross multiply
    387.38x = 533.88 × 358.04
  4. Step 4: Simplify right side
    387.38x = 191,147.73
  5. Step 5: Solve for x
    x = 191,147.73/387.38
  6. Step 6: Final answer
    x = 493.44

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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.