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Finding the Fourth Proportional to 1,239.76, 1,862.07 and 1,162

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Solution

The fourth proportional to 1,239.76, 1,862.07 and 1,162 is: 1,745.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.76 : 1,862.07 = 1,162 : x
  2. Step 2: Convert to fraction form
    1,239.76/1,862.07 = 1,162/x
  3. Step 3: Cross multiply
    1,239.76x = 1,862.07 × 1,162
  4. Step 4: Simplify right side
    1,239.76x = 2,163,725.34
  5. Step 5: Solve for x
    x = 2,163,725.34/1,239.76
  6. Step 6: Final answer
    x = 1,745.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.