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Finding the Fourth Proportional to 372.39, 517.13 and 368.79

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Solution

The fourth proportional to 372.39, 517.13 and 368.79 is: 512.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.39 : 517.13 = 368.79 : x
  2. Step 2: Convert to fraction form
    372.39/517.13 = 368.79/x
  3. Step 3: Cross multiply
    372.39x = 517.13 × 368.79
  4. Step 4: Simplify right side
    372.39x = 190,710.53
  5. Step 5: Solve for x
    x = 190,710.53/372.39
  6. Step 6: Final answer
    x = 512.13

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.