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Finding the Fourth Proportional to 769.16, 1,148.14 and 671.96

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Solution

The fourth proportional to 769.16, 1,148.14 and 671.96 is: 1,003.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.16 : 1,148.14 = 671.96 : x
  2. Step 2: Convert to fraction form
    769.16/1,148.14 = 671.96/x
  3. Step 3: Cross multiply
    769.16x = 1,148.14 × 671.96
  4. Step 4: Simplify right side
    769.16x = 771,504.15
  5. Step 5: Solve for x
    x = 771,504.15/769.16
  6. Step 6: Final answer
    x = 1,003.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.