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Finding the Fourth Proportional to 2,773.60, 4,160.32 and 1,129.74

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Solution

The fourth proportional to 2,773.60, 4,160.32 and 1,129.74 is: 1,694.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,773.60 : 4,160.32 = 1,129.74 : x
  2. Step 2: Convert to fraction form
    2,773.60/4,160.32 = 1,129.74/x
  3. Step 3: Cross multiply
    2,773.60x = 4,160.32 × 1,129.74
  4. Step 4: Simplify right side
    2,773.60x = 4,700,079.92
  5. Step 5: Solve for x
    x = 4,700,079.92/2,773.60
  6. Step 6: Final answer
    x = 1,694.58

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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.