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Finding the Fourth Proportional to 1,171.38, 1,756.15 and 440.87

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Solution

The fourth proportional to 1,171.38, 1,756.15 and 440.87 is: 660.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.38 : 1,756.15 = 440.87 : x
  2. Step 2: Convert to fraction form
    1,171.38/1,756.15 = 440.87/x
  3. Step 3: Cross multiply
    1,171.38x = 1,756.15 × 440.87
  4. Step 4: Simplify right side
    1,171.38x = 774,233.85
  5. Step 5: Solve for x
    x = 774,233.85/1,171.38
  6. Step 6: Final answer
    x = 660.96

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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.