Home / 2,331.10-3,496.65-687.70

Finding the Fourth Proportional to 2,331.10, 3,496.65 and 687.70

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Solution

The fourth proportional to 2,331.10, 3,496.65 and 687.70 is: 1,031.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,331.10 : 3,496.65 = 687.70 : x
  2. Step 2: Convert to fraction form
    2,331.10/3,496.65 = 687.70/x
  3. Step 3: Cross multiply
    2,331.10x = 3,496.65 × 687.70
  4. Step 4: Simplify right side
    2,331.10x = 2,404,646.21
  5. Step 5: Solve for x
    x = 2,404,646.21/2,331.10
  6. Step 6: Final answer
    x = 1,031.55

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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.