Home / 2,132.57-2,942.87-1,188.31

Finding the Fourth Proportional to 2,132.57, 2,942.87 and 1,188.31

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Solution

The fourth proportional to 2,132.57, 2,942.87 and 1,188.31 is: 1,639.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,132.57 : 2,942.87 = 1,188.31 : x
  2. Step 2: Convert to fraction form
    2,132.57/2,942.87 = 1,188.31/x
  3. Step 3: Cross multiply
    2,132.57x = 2,942.87 × 1,188.31
  4. Step 4: Simplify right side
    2,132.57x = 3,497,044.04
  5. Step 5: Solve for x
    x = 3,497,044.04/2,132.57
  6. Step 6: Final answer
    x = 1,639.83

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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.