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Finding the Fourth Proportional to 502.52, 753.90 and 259.40

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Solution

The fourth proportional to 502.52, 753.90 and 259.40 is: 389.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.52 : 753.90 = 259.40 : x
  2. Step 2: Convert to fraction form
    502.52/753.90 = 259.40/x
  3. Step 3: Cross multiply
    502.52x = 753.90 × 259.40
  4. Step 4: Simplify right side
    502.52x = 195,561.66
  5. Step 5: Solve for x
    x = 195,561.66/502.52
  6. Step 6: Final answer
    x = 389.16

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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.