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Finding the Fourth Proportional to 1,169.51, 1,613.66 and 671.90

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Solution

The fourth proportional to 1,169.51, 1,613.66 and 671.90 is: 927.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.51 : 1,613.66 = 671.90 : x
  2. Step 2: Convert to fraction form
    1,169.51/1,613.66 = 671.90/x
  3. Step 3: Cross multiply
    1,169.51x = 1,613.66 × 671.90
  4. Step 4: Simplify right side
    1,169.51x = 1,084,206.73
  5. Step 5: Solve for x
    x = 1,084,206.73/1,169.51
  6. Step 6: Final answer
    x = 927.06

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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.