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Finding the Fourth Proportional to 385.11, 531.49 and 237.72

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Solution

The fourth proportional to 385.11, 531.49 and 237.72 is: 328.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.11 : 531.49 = 237.72 : x
  2. Step 2: Convert to fraction form
    385.11/531.49 = 237.72/x
  3. Step 3: Cross multiply
    385.11x = 531.49 × 237.72
  4. Step 4: Simplify right side
    385.11x = 126,345.80
  5. Step 5: Solve for x
    x = 126,345.80/385.11
  6. Step 6: Final answer
    x = 328.08

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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.