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Finding the Fourth Proportional to 1,003.52, 1,385.04 and 654.20

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Solution

The fourth proportional to 1,003.52, 1,385.04 and 654.20 is: 902.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.52 : 1,385.04 = 654.20 : x
  2. Step 2: Convert to fraction form
    1,003.52/1,385.04 = 654.20/x
  3. Step 3: Cross multiply
    1,003.52x = 1,385.04 × 654.20
  4. Step 4: Simplify right side
    1,003.52x = 906,093.17
  5. Step 5: Solve for x
    x = 906,093.17/1,003.52
  6. Step 6: Final answer
    x = 902.91

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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.