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Finding the Fourth Proportional to 868.24, 1,302.42 and 502.90

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Solution

The fourth proportional to 868.24, 1,302.42 and 502.90 is: 754.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.24 : 1,302.42 = 502.90 : x
  2. Step 2: Convert to fraction form
    868.24/1,302.42 = 502.90/x
  3. Step 3: Cross multiply
    868.24x = 1,302.42 × 502.90
  4. Step 4: Simplify right side
    868.24x = 654,987.02
  5. Step 5: Solve for x
    x = 654,987.02/868.24
  6. Step 6: Final answer
    x = 754.38

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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.