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Finding the Fourth Proportional to 1,241.95, 1,713.68 and 717.88

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Solution

The fourth proportional to 1,241.95, 1,713.68 and 717.88 is: 990.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.95 : 1,713.68 = 717.88 : x
  2. Step 2: Convert to fraction form
    1,241.95/1,713.68 = 717.88/x
  3. Step 3: Cross multiply
    1,241.95x = 1,713.68 × 717.88
  4. Step 4: Simplify right side
    1,241.95x = 1,230,209.82
  5. Step 5: Solve for x
    x = 1,230,209.82/1,241.95
  6. Step 6: Final answer
    x = 990.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.