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Finding the Fourth Proportional to 1,169.21, 1,613.33 and 671.77

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Solution

The fourth proportional to 1,169.21, 1,613.33 and 671.77 is: 926.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.21 : 1,613.33 = 671.77 : x
  2. Step 2: Convert to fraction form
    1,169.21/1,613.33 = 671.77/x
  3. Step 3: Cross multiply
    1,169.21x = 1,613.33 × 671.77
  4. Step 4: Simplify right side
    1,169.21x = 1,083,784.28
  5. Step 5: Solve for x
    x = 1,083,784.28/1,169.21
  6. Step 6: Final answer
    x = 926.94

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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.