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Finding the Fourth Proportional to 1,172.97, 1,760.63 and 557.15

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Solution

The fourth proportional to 1,172.97, 1,760.63 and 557.15 is: 836.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.97 : 1,760.63 = 557.15 : x
  2. Step 2: Convert to fraction form
    1,172.97/1,760.63 = 557.15/x
  3. Step 3: Cross multiply
    1,172.97x = 1,760.63 × 557.15
  4. Step 4: Simplify right side
    1,172.97x = 980,923.42
  5. Step 5: Solve for x
    x = 980,923.42/1,172.97
  6. Step 6: Final answer
    x = 836.27

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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.