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Finding the Fourth Proportional to 1,241.58, 1,713.45 and 717.61

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Solution

The fourth proportional to 1,241.58, 1,713.45 and 717.61 is: 990.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.58 : 1,713.45 = 717.61 : x
  2. Step 2: Convert to fraction form
    1,241.58/1,713.45 = 717.61/x
  3. Step 3: Cross multiply
    1,241.58x = 1,713.45 × 717.61
  4. Step 4: Simplify right side
    1,241.58x = 1,229,590.47
  5. Step 5: Solve for x
    x = 1,229,590.47/1,241.58
  6. Step 6: Final answer
    x = 990.34

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1.5x scale

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.