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Finding the Fourth Proportional to 748.87, 1,117.01 and 671.02

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Solution

The fourth proportional to 748.87, 1,117.01 and 671.02 is: 1,000.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.87 : 1,117.01 = 671.02 : x
  2. Step 2: Convert to fraction form
    748.87/1,117.01 = 671.02/x
  3. Step 3: Cross multiply
    748.87x = 1,117.01 × 671.02
  4. Step 4: Simplify right side
    748.87x = 749,534.94
  5. Step 5: Solve for x
    x = 749,534.94/748.87
  6. Step 6: Final answer
    x = 1,000.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.