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Finding the Fourth Proportional to 748.53, 1,031.04 and 630.36

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Solution

The fourth proportional to 748.53, 1,031.04 and 630.36 is: 868.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.53 : 1,031.04 = 630.36 : x
  2. Step 2: Convert to fraction form
    748.53/1,031.04 = 630.36/x
  3. Step 3: Cross multiply
    748.53x = 1,031.04 × 630.36
  4. Step 4: Simplify right side
    748.53x = 649,926.37
  5. Step 5: Solve for x
    x = 649,926.37/748.53
  6. Step 6: Final answer
    x = 868.27

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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.