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Finding the Fourth Proportional to 1,171.18, 1,756 and 440.34

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Solution

The fourth proportional to 1,171.18, 1,756 and 440.34 is: 660.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.18 : 1,756 = 440.34 : x
  2. Step 2: Convert to fraction form
    1,171.18/1,756 = 440.34/x
  3. Step 3: Cross multiply
    1,171.18x = 1,756 × 440.34
  4. Step 4: Simplify right side
    1,171.18x = 773,237.04
  5. Step 5: Solve for x
    x = 773,237.04/1,171.18
  6. Step 6: Final answer
    x = 660.22

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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.