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Finding the Fourth Proportional to 1,174.81, 1,761.07 and 654.33

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Solution

The fourth proportional to 1,174.81, 1,761.07 and 654.33 is: 980.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.81 : 1,761.07 = 654.33 : x
  2. Step 2: Convert to fraction form
    1,174.81/1,761.07 = 654.33/x
  3. Step 3: Cross multiply
    1,174.81x = 1,761.07 × 654.33
  4. Step 4: Simplify right side
    1,174.81x = 1,152,319.30
  5. Step 5: Solve for x
    x = 1,152,319.30/1,174.81
  6. Step 6: Final answer
    x = 980.86

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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.