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Finding the Fourth Proportional to 1,540.56, 2,308.52 and 615.20

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Solution

The fourth proportional to 1,540.56, 2,308.52 and 615.20 is: 921.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.56 : 2,308.52 = 615.20 : x
  2. Step 2: Convert to fraction form
    1,540.56/2,308.52 = 615.20/x
  3. Step 3: Cross multiply
    1,540.56x = 2,308.52 × 615.20
  4. Step 4: Simplify right side
    1,540.56x = 1,420,201.50
  5. Step 5: Solve for x
    x = 1,420,201.50/1,540.56
  6. Step 6: Final answer
    x = 921.87

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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.