Home / 2,631.78-3,631.92-1,512.90

Finding the Fourth Proportional to 2,631.78, 3,631.92 and 1,512.90

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Solution

The fourth proportional to 2,631.78, 3,631.92 and 1,512.90 is: 2,087.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.78 : 3,631.92 = 1,512.90 : x
  2. Step 2: Convert to fraction form
    2,631.78/3,631.92 = 1,512.90/x
  3. Step 3: Cross multiply
    2,631.78x = 3,631.92 × 1,512.90
  4. Step 4: Simplify right side
    2,631.78x = 5,494,731.77
  5. Step 5: Solve for x
    x = 5,494,731.77/2,631.78
  6. Step 6: Final answer
    x = 2,087.84

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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.