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Finding the Fourth Proportional to 756.92, 1,044.43 and 425.28

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Solution

The fourth proportional to 756.92, 1,044.43 and 425.28 is: 586.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.92 : 1,044.43 = 425.28 : x
  2. Step 2: Convert to fraction form
    756.92/1,044.43 = 425.28/x
  3. Step 3: Cross multiply
    756.92x = 1,044.43 × 425.28
  4. Step 4: Simplify right side
    756.92x = 444,180.44
  5. Step 5: Solve for x
    x = 444,180.44/756.92
  6. Step 6: Final answer
    x = 586.82

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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.