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Finding the Fourth Proportional to 1,635.18, 2,452.86 and 661.17

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Solution

The fourth proportional to 1,635.18, 2,452.86 and 661.17 is: 991.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,635.18 : 2,452.86 = 661.17 : x
  2. Step 2: Convert to fraction form
    1,635.18/2,452.86 = 661.17/x
  3. Step 3: Cross multiply
    1,635.18x = 2,452.86 × 661.17
  4. Step 4: Simplify right side
    1,635.18x = 1,621,757.45
  5. Step 5: Solve for x
    x = 1,621,757.45/1,635.18
  6. Step 6: Final answer
    x = 991.79

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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.