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Finding the Fourth Proportional to 2,331.33, 3,497.55 and 687.81

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Solution

The fourth proportional to 2,331.33, 3,497.55 and 687.81 is: 1,031.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,331.33 : 3,497.55 = 687.81 : x
  2. Step 2: Convert to fraction form
    2,331.33/3,497.55 = 687.81/x
  3. Step 3: Cross multiply
    2,331.33x = 3,497.55 × 687.81
  4. Step 4: Simplify right side
    2,331.33x = 2,405,649.87
  5. Step 5: Solve for x
    x = 2,405,649.87/2,331.33
  6. Step 6: Final answer
    x = 1,031.88

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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.