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Finding the Fourth Proportional to 1,263.36, 1,742.36 and 1,000.92

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Solution

The fourth proportional to 1,263.36, 1,742.36 and 1,000.92 is: 1,380.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.36 : 1,742.36 = 1,000.92 : x
  2. Step 2: Convert to fraction form
    1,263.36/1,742.36 = 1,000.92/x
  3. Step 3: Cross multiply
    1,263.36x = 1,742.36 × 1,000.92
  4. Step 4: Simplify right side
    1,263.36x = 1,743,962.97
  5. Step 5: Solve for x
    x = 1,743,962.97/1,263.36
  6. Step 6: Final answer
    x = 1,380.42

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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.