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Finding the Fourth Proportional to 2,331.74, 3,496.98 and 687.86

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Solution

The fourth proportional to 2,331.74, 3,496.98 and 687.86 is: 1,031.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,331.74 : 3,496.98 = 687.86 : x
  2. Step 2: Convert to fraction form
    2,331.74/3,496.98 = 687.86/x
  3. Step 3: Cross multiply
    2,331.74x = 3,496.98 × 687.86
  4. Step 4: Simplify right side
    2,331.74x = 2,405,432.66
  5. Step 5: Solve for x
    x = 2,405,432.66/2,331.74
  6. Step 6: Final answer
    x = 1,031.60

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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.