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Finding the Fourth Proportional to 487.96, 731.78 and 141.26

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Solution

The fourth proportional to 487.96, 731.78 and 141.26 is: 211.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.96 : 731.78 = 141.26 : x
  2. Step 2: Convert to fraction form
    487.96/731.78 = 141.26/x
  3. Step 3: Cross multiply
    487.96x = 731.78 × 141.26
  4. Step 4: Simplify right side
    487.96x = 103,371.24
  5. Step 5: Solve for x
    x = 103,371.24/487.96
  6. Step 6: Final answer
    x = 211.84

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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.