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Finding the Fourth Proportional to 1,073.40, 1,481.22 and 625.20

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Solution

The fourth proportional to 1,073.40, 1,481.22 and 625.20 is: 862.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,073.40 : 1,481.22 = 625.20 : x
  2. Step 2: Convert to fraction form
    1,073.40/1,481.22 = 625.20/x
  3. Step 3: Cross multiply
    1,073.40x = 1,481.22 × 625.20
  4. Step 4: Simplify right side
    1,073.40x = 926,058.74
  5. Step 5: Solve for x
    x = 926,058.74/1,073.40
  6. Step 6: Final answer
    x = 862.73

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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.