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Finding the Fourth Proportional to 1,174.68, 1,760.76 and 558

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Solution

The fourth proportional to 1,174.68, 1,760.76 and 558 is: 836.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.68 : 1,760.76 = 558 : x
  2. Step 2: Convert to fraction form
    1,174.68/1,760.76 = 558/x
  3. Step 3: Cross multiply
    1,174.68x = 1,760.76 × 558
  4. Step 4: Simplify right side
    1,174.68x = 982,504.08
  5. Step 5: Solve for x
    x = 982,504.08/1,174.68
  6. Step 6: Final answer
    x = 836.40

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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.