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Finding the Fourth Proportional to 1,011.05, 1,516.17 and 361.43

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Solution

The fourth proportional to 1,011.05, 1,516.17 and 361.43 is: 542.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.05 : 1,516.17 = 361.43 : x
  2. Step 2: Convert to fraction form
    1,011.05/1,516.17 = 361.43/x
  3. Step 3: Cross multiply
    1,011.05x = 1,516.17 × 361.43
  4. Step 4: Simplify right side
    1,011.05x = 547,989.32
  5. Step 5: Solve for x
    x = 547,989.32/1,011.05
  6. Step 6: Final answer
    x = 542.00

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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.