Home / 2,631.79-3,631.48-1,512.78

Finding the Fourth Proportional to 2,631.79, 3,631.48 and 1,512.78

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Solution

The fourth proportional to 2,631.79, 3,631.48 and 1,512.78 is: 2,087.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.79 : 3,631.48 = 1,512.78 : x
  2. Step 2: Convert to fraction form
    2,631.79/3,631.48 = 1,512.78/x
  3. Step 3: Cross multiply
    2,631.79x = 3,631.48 × 1,512.78
  4. Step 4: Simplify right side
    2,631.79x = 5,493,621.42
  5. Step 5: Solve for x
    x = 5,493,621.42/2,631.79
  6. Step 6: Final answer
    x = 2,087.41

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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.