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Finding the Fourth Proportional to 1,169.18, 1,613.47 and 671.85

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Solution

The fourth proportional to 1,169.18, 1,613.47 and 671.85 is: 927.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.18 : 1,613.47 = 671.85 : x
  2. Step 2: Convert to fraction form
    1,169.18/1,613.47 = 671.85/x
  3. Step 3: Cross multiply
    1,169.18x = 1,613.47 × 671.85
  4. Step 4: Simplify right side
    1,169.18x = 1,084,006.46
  5. Step 5: Solve for x
    x = 1,084,006.46/1,169.18
  6. Step 6: Final answer
    x = 927.15

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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.