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Finding the Fourth Proportional to 869.61, 1,302.82 and 503.62

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Solution

The fourth proportional to 869.61, 1,302.82 and 503.62 is: 754.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.61 : 1,302.82 = 503.62 : x
  2. Step 2: Convert to fraction form
    869.61/1,302.82 = 503.62/x
  3. Step 3: Cross multiply
    869.61x = 1,302.82 × 503.62
  4. Step 4: Simplify right side
    869.61x = 656,126.21
  5. Step 5: Solve for x
    x = 656,126.21/869.61
  6. Step 6: Final answer
    x = 754.51

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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.