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Finding the Fourth Proportional to 1,002.03, 1,508.90 and 743.85

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Solution

The fourth proportional to 1,002.03, 1,508.90 and 743.85 is: 1,120.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.03 : 1,508.90 = 743.85 : x
  2. Step 2: Convert to fraction form
    1,002.03/1,508.90 = 743.85/x
  3. Step 3: Cross multiply
    1,002.03x = 1,508.90 × 743.85
  4. Step 4: Simplify right side
    1,002.03x = 1,122,395.27
  5. Step 5: Solve for x
    x = 1,122,395.27/1,002.03
  6. Step 6: Final answer
    x = 1,120.12

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.