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Finding the Fourth Proportional to 1,271.38, 1,754.47 and 773.84

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Solution

The fourth proportional to 1,271.38, 1,754.47 and 773.84 is: 1,067.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.38 : 1,754.47 = 773.84 : x
  2. Step 2: Convert to fraction form
    1,271.38/1,754.47 = 773.84/x
  3. Step 3: Cross multiply
    1,271.38x = 1,754.47 × 773.84
  4. Step 4: Simplify right side
    1,271.38x = 1,357,679.06
  5. Step 5: Solve for x
    x = 1,357,679.06/1,271.38
  6. Step 6: Final answer
    x = 1,067.88

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1.5x scale

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.