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Finding the Fourth Proportional to 1,243.44, 1,871.12 and 1,025.68

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Solution

The fourth proportional to 1,243.44, 1,871.12 and 1,025.68 is: 1,543.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.44 : 1,871.12 = 1,025.68 : x
  2. Step 2: Convert to fraction form
    1,243.44/1,871.12 = 1,025.68/x
  3. Step 3: Cross multiply
    1,243.44x = 1,871.12 × 1,025.68
  4. Step 4: Simplify right side
    1,243.44x = 1,919,170.36
  5. Step 5: Solve for x
    x = 1,919,170.36/1,243.44
  6. Step 6: Final answer
    x = 1,543.44

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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.