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Finding the Fourth Proportional to 1,168.87, 1,613.07 and 671.61

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Solution

The fourth proportional to 1,168.87, 1,613.07 and 671.61 is: 926.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.87 : 1,613.07 = 671.61 : x
  2. Step 2: Convert to fraction form
    1,168.87/1,613.07 = 671.61/x
  3. Step 3: Cross multiply
    1,168.87x = 1,613.07 × 671.61
  4. Step 4: Simplify right side
    1,168.87x = 1,083,345.88
  5. Step 5: Solve for x
    x = 1,083,345.88/1,168.87
  6. Step 6: Final answer
    x = 926.84

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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.