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Finding the Fourth Proportional to 1,266.97, 1,748.10 and 769.63

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Solution

The fourth proportional to 1,266.97, 1,748.10 and 769.63 is: 1,061.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.97 : 1,748.10 = 769.63 : x
  2. Step 2: Convert to fraction form
    1,266.97/1,748.10 = 769.63/x
  3. Step 3: Cross multiply
    1,266.97x = 1,748.10 × 769.63
  4. Step 4: Simplify right side
    1,266.97x = 1,345,390.20
  5. Step 5: Solve for x
    x = 1,345,390.20/1,266.97
  6. Step 6: Final answer
    x = 1,061.90

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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.