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Finding the Fourth Proportional to 1,057.45, 1,459.20 and 615.33

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Solution

The fourth proportional to 1,057.45, 1,459.20 and 615.33 is: 849.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.45 : 1,459.20 = 615.33 : x
  2. Step 2: Convert to fraction form
    1,057.45/1,459.20 = 615.33/x
  3. Step 3: Cross multiply
    1,057.45x = 1,459.20 × 615.33
  4. Step 4: Simplify right side
    1,057.45x = 897,889.54
  5. Step 5: Solve for x
    x = 897,889.54/1,057.45
  6. Step 6: Final answer
    x = 849.11

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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.