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Finding the Fourth Proportional to 1,087.47, 1,500.61 and 615.41

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Solution

The fourth proportional to 1,087.47, 1,500.61 and 615.41 is: 849.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.47 : 1,500.61 = 615.41 : x
  2. Step 2: Convert to fraction form
    1,087.47/1,500.61 = 615.41/x
  3. Step 3: Cross multiply
    1,087.47x = 1,500.61 × 615.41
  4. Step 4: Simplify right side
    1,087.47x = 923,479.82
  5. Step 5: Solve for x
    x = 923,479.82/1,087.47
  6. Step 6: Final answer
    x = 849.20

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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.