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Finding the Fourth Proportional to 1,191.52, 1,777.24 and 1,155.07

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Solution

The fourth proportional to 1,191.52, 1,777.24 and 1,155.07 is: 1,722.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.52 : 1,777.24 = 1,155.07 : x
  2. Step 2: Convert to fraction form
    1,191.52/1,777.24 = 1,155.07/x
  3. Step 3: Cross multiply
    1,191.52x = 1,777.24 × 1,155.07
  4. Step 4: Simplify right side
    1,191.52x = 2,052,836.61
  5. Step 5: Solve for x
    x = 2,052,836.61/1,191.52
  6. Step 6: Final answer
    x = 1,722.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.