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Finding the Fourth Proportional to 502.79, 754.20 and 156.13

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Solution

The fourth proportional to 502.79, 754.20 and 156.13 is: 234.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.79 : 754.20 = 156.13 : x
  2. Step 2: Convert to fraction form
    502.79/754.20 = 156.13/x
  3. Step 3: Cross multiply
    502.79x = 754.20 × 156.13
  4. Step 4: Simplify right side
    502.79x = 117,751.36
  5. Step 5: Solve for x
    x = 117,751.36/502.79
  6. Step 6: Final answer
    x = 234.20

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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.