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Finding the Fourth Proportional to 716.88, 1,074.26 and 408.58

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Solution

The fourth proportional to 716.88, 1,074.26 and 408.58 is: 612.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.88 : 1,074.26 = 408.58 : x
  2. Step 2: Convert to fraction form
    716.88/1,074.26 = 408.58/x
  3. Step 3: Cross multiply
    716.88x = 1,074.26 × 408.58
  4. Step 4: Simplify right side
    716.88x = 438,919.49
  5. Step 5: Solve for x
    x = 438,919.49/716.88
  6. Step 6: Final answer
    x = 612.26

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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.