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Finding the Fourth Proportional to 3,765.74, 5,649.88 and 1,687.18

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Solution

The fourth proportional to 3,765.74, 5,649.88 and 1,687.18 is: 2,531.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,765.74 : 5,649.88 = 1,687.18 : x
  2. Step 2: Convert to fraction form
    3,765.74/5,649.88 = 1,687.18/x
  3. Step 3: Cross multiply
    3,765.74x = 5,649.88 × 1,687.18
  4. Step 4: Simplify right side
    3,765.74x = 9,532,364.54
  5. Step 5: Solve for x
    x = 9,532,364.54/3,765.74
  6. Step 6: Final answer
    x = 2,531.34

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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.