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Finding the Fourth Proportional to 923.04, 1,380.42 and 836.91

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Solution

The fourth proportional to 923.04, 1,380.42 and 836.91 is: 1,251.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.04 : 1,380.42 = 836.91 : x
  2. Step 2: Convert to fraction form
    923.04/1,380.42 = 836.91/x
  3. Step 3: Cross multiply
    923.04x = 1,380.42 × 836.91
  4. Step 4: Simplify right side
    923.04x = 1,155,287.30
  5. Step 5: Solve for x
    x = 1,155,287.30/923.04
  6. Step 6: Final answer
    x = 1,251.61

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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.