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Finding the Fourth Proportional to 869.72, 1,304.58 and 527.96

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Solution

The fourth proportional to 869.72, 1,304.58 and 527.96 is: 791.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.72 : 1,304.58 = 527.96 : x
  2. Step 2: Convert to fraction form
    869.72/1,304.58 = 527.96/x
  3. Step 3: Cross multiply
    869.72x = 1,304.58 × 527.96
  4. Step 4: Simplify right side
    869.72x = 688,766.06
  5. Step 5: Solve for x
    x = 688,766.06/869.72
  6. Step 6: Final answer
    x = 791.94

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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.