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Finding the Fourth Proportional to 1,238.38, 1,706.87 and 1,027.88

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Solution

The fourth proportional to 1,238.38, 1,706.87 and 1,027.88 is: 1,416.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.38 : 1,706.87 = 1,027.88 : x
  2. Step 2: Convert to fraction form
    1,238.38/1,706.87 = 1,027.88/x
  3. Step 3: Cross multiply
    1,238.38x = 1,706.87 × 1,027.88
  4. Step 4: Simplify right side
    1,238.38x = 1,754,457.54
  5. Step 5: Solve for x
    x = 1,754,457.54/1,238.38
  6. Step 6: Final answer
    x = 1,416.74

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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.