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Finding the Fourth Proportional to 372.07, 557.71 and 140.81

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Solution

The fourth proportional to 372.07, 557.71 and 140.81 is: 211.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.07 : 557.71 = 140.81 : x
  2. Step 2: Convert to fraction form
    372.07/557.71 = 140.81/x
  3. Step 3: Cross multiply
    372.07x = 557.71 × 140.81
  4. Step 4: Simplify right side
    372.07x = 78,531.15
  5. Step 5: Solve for x
    x = 78,531.15/372.07
  6. Step 6: Final answer
    x = 211.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.