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Finding the Fourth Proportional to 1,057.33, 1,459.29 and 615.49

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Solution

The fourth proportional to 1,057.33, 1,459.29 and 615.49 is: 849.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.33 : 1,459.29 = 615.49 : x
  2. Step 2: Convert to fraction form
    1,057.33/1,459.29 = 615.49/x
  3. Step 3: Cross multiply
    1,057.33x = 1,459.29 × 615.49
  4. Step 4: Simplify right side
    1,057.33x = 898,179.44
  5. Step 5: Solve for x
    x = 898,179.44/1,057.33
  6. Step 6: Final answer
    x = 849.48

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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.