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Finding the Fourth Proportional to 387.88, 585.28 and 372.88

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Solution

The fourth proportional to 387.88, 585.28 and 372.88 is: 562.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.88 : 585.28 = 372.88 : x
  2. Step 2: Convert to fraction form
    387.88/585.28 = 372.88/x
  3. Step 3: Cross multiply
    387.88x = 585.28 × 372.88
  4. Step 4: Simplify right side
    387.88x = 218,239.21
  5. Step 5: Solve for x
    x = 218,239.21/387.88
  6. Step 6: Final answer
    x = 562.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.