Home / 1,191.60-1,788.56-1,125.86

Finding the Fourth Proportional to 1,191.60, 1,788.56 and 1,125.86

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Solution

The fourth proportional to 1,191.60, 1,788.56 and 1,125.86 is: 1,689.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.60 : 1,788.56 = 1,125.86 : x
  2. Step 2: Convert to fraction form
    1,191.60/1,788.56 = 1,125.86/x
  3. Step 3: Cross multiply
    1,191.60x = 1,788.56 × 1,125.86
  4. Step 4: Simplify right side
    1,191.60x = 2,013,653.59
  5. Step 5: Solve for x
    x = 2,013,653.59/1,191.60
  6. Step 6: Final answer
    x = 1,689.87

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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.