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Finding the Fourth Proportional to 756.81, 1,044.40 and 425.24

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Solution

The fourth proportional to 756.81, 1,044.40 and 425.24 is: 586.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.81 : 1,044.40 = 425.24 : x
  2. Step 2: Convert to fraction form
    756.81/1,044.40 = 425.24/x
  3. Step 3: Cross multiply
    756.81x = 1,044.40 × 425.24
  4. Step 4: Simplify right side
    756.81x = 444,120.66
  5. Step 5: Solve for x
    x = 444,120.66/756.81
  6. Step 6: Final answer
    x = 586.83

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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.