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Finding the Fourth Proportional to 1,238.14, 1,708.95 and 773.02

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Solution

The fourth proportional to 1,238.14, 1,708.95 and 773.02 is: 1,066.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.14 : 1,708.95 = 773.02 : x
  2. Step 2: Convert to fraction form
    1,238.14/1,708.95 = 773.02/x
  3. Step 3: Cross multiply
    1,238.14x = 1,708.95 × 773.02
  4. Step 4: Simplify right side
    1,238.14x = 1,321,052.53
  5. Step 5: Solve for x
    x = 1,321,052.53/1,238.14
  6. Step 6: Final answer
    x = 1,066.97

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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.