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Finding the Fourth Proportional to 1,481.44, 2,220.84 and 615.20

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Solution

The fourth proportional to 1,481.44, 2,220.84 and 615.20 is: 922.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.44 : 2,220.84 = 615.20 : x
  2. Step 2: Convert to fraction form
    1,481.44/2,220.84 = 615.20/x
  3. Step 3: Cross multiply
    1,481.44x = 2,220.84 × 615.20
  4. Step 4: Simplify right side
    1,481.44x = 1,366,260.77
  5. Step 5: Solve for x
    x = 1,366,260.77/1,481.44
  6. Step 6: Final answer
    x = 922.25

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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.