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Finding the Fourth Proportional to 1,044.62, 1,439.92 and 823.28

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Solution

The fourth proportional to 1,044.62, 1,439.92 and 823.28 is: 1,134.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.62 : 1,439.92 = 823.28 : x
  2. Step 2: Convert to fraction form
    1,044.62/1,439.92 = 823.28/x
  3. Step 3: Cross multiply
    1,044.62x = 1,439.92 × 823.28
  4. Step 4: Simplify right side
    1,044.62x = 1,185,457.34
  5. Step 5: Solve for x
    x = 1,185,457.34/1,044.62
  6. Step 6: Final answer
    x = 1,134.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.