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Finding the Fourth Proportional to 832.38, 1,153.61 and 819.90

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Solution

The fourth proportional to 832.38, 1,153.61 and 819.90 is: 1,136.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.38 : 1,153.61 = 819.90 : x
  2. Step 2: Convert to fraction form
    832.38/1,153.61 = 819.90/x
  3. Step 3: Cross multiply
    832.38x = 1,153.61 × 819.90
  4. Step 4: Simplify right side
    832.38x = 945,840.74
  5. Step 5: Solve for x
    x = 945,840.74/832.38
  6. Step 6: Final answer
    x = 1,136.31

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.