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Finding the Fourth Proportional to 716.42, 1,067.22 and 671.60

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Solution

The fourth proportional to 716.42, 1,067.22 and 671.60 is: 1,000.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.42 : 1,067.22 = 671.60 : x
  2. Step 2: Convert to fraction form
    716.42/1,067.22 = 671.60/x
  3. Step 3: Cross multiply
    716.42x = 1,067.22 × 671.60
  4. Step 4: Simplify right side
    716.42x = 716,739.62
  5. Step 5: Solve for x
    x = 716,739.62/716.42
  6. Step 6: Final answer
    x = 1,000.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.