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Finding the Fourth Proportional to 1,027.01, 1,540.61 and 442.20

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Solution

The fourth proportional to 1,027.01, 1,540.61 and 442.20 is: 663.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.01 : 1,540.61 = 442.20 : x
  2. Step 2: Convert to fraction form
    1,027.01/1,540.61 = 442.20/x
  3. Step 3: Cross multiply
    1,027.01x = 1,540.61 × 442.20
  4. Step 4: Simplify right side
    1,027.01x = 681,255.53
  5. Step 5: Solve for x
    x = 681,255.53/1,027.01
  6. Step 6: Final answer
    x = 663.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.