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Finding the Fourth Proportional to 908.81, 1,253.34 and 769.29

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Solution

The fourth proportional to 908.81, 1,253.34 and 769.29 is: 1,060.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.81 : 1,253.34 = 769.29 : x
  2. Step 2: Convert to fraction form
    908.81/1,253.34 = 769.29/x
  3. Step 3: Cross multiply
    908.81x = 1,253.34 × 769.29
  4. Step 4: Simplify right side
    908.81x = 964,181.93
  5. Step 5: Solve for x
    x = 964,181.93/908.81
  6. Step 6: Final answer
    x = 1,060.93

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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.