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Finding the Fourth Proportional to 1,171.24, 1,617.24 and 908.80

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Solution

The fourth proportional to 1,171.24, 1,617.24 and 908.80 is: 1,254.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.24 : 1,617.24 = 908.80 : x
  2. Step 2: Convert to fraction form
    1,171.24/1,617.24 = 908.80/x
  3. Step 3: Cross multiply
    1,171.24x = 1,617.24 × 908.80
  4. Step 4: Simplify right side
    1,171.24x = 1,469,747.71
  5. Step 5: Solve for x
    x = 1,469,747.71/1,171.24
  6. Step 6: Final answer
    x = 1,254.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.