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Finding the Fourth Proportional to 502.68, 753.56 and 258.66

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Solution

The fourth proportional to 502.68, 753.56 and 258.66 is: 387.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.68 : 753.56 = 258.66 : x
  2. Step 2: Convert to fraction form
    502.68/753.56 = 258.66/x
  3. Step 3: Cross multiply
    502.68x = 753.56 × 258.66
  4. Step 4: Simplify right side
    502.68x = 194,915.83
  5. Step 5: Solve for x
    x = 194,915.83/502.68
  6. Step 6: Final answer
    x = 387.75

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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.