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Finding the Fourth Proportional to 1,169.30, 1,613.58 and 671.90

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Solution

The fourth proportional to 1,169.30, 1,613.58 and 671.90 is: 927.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.30 : 1,613.58 = 671.90 : x
  2. Step 2: Convert to fraction form
    1,169.30/1,613.58 = 671.90/x
  3. Step 3: Cross multiply
    1,169.30x = 1,613.58 × 671.90
  4. Step 4: Simplify right side
    1,169.30x = 1,084,164.40
  5. Step 5: Solve for x
    x = 1,084,164.40/1,169.30
  6. Step 6: Final answer
    x = 927.19

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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.