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Finding the Fourth Proportional to 2,537.28, 3,805.65 and 688.59

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Solution

The fourth proportional to 2,537.28, 3,805.65 and 688.59 is: 1,032.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,537.28 : 3,805.65 = 688.59 : x
  2. Step 2: Convert to fraction form
    2,537.28/3,805.65 = 688.59/x
  3. Step 3: Cross multiply
    2,537.28x = 3,805.65 × 688.59
  4. Step 4: Simplify right side
    2,537.28x = 2,620,532.53
  5. Step 5: Solve for x
    x = 2,620,532.53/2,537.28
  6. Step 6: Final answer
    x = 1,032.81

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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.