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Finding the Fourth Proportional to 1,271.14, 1,753.68 and 798.85

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Solution

The fourth proportional to 1,271.14, 1,753.68 and 798.85 is: 1,102.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.14 : 1,753.68 = 798.85 : x
  2. Step 2: Convert to fraction form
    1,271.14/1,753.68 = 798.85/x
  3. Step 3: Cross multiply
    1,271.14x = 1,753.68 × 798.85
  4. Step 4: Simplify right side
    1,271.14x = 1,400,927.27
  5. Step 5: Solve for x
    x = 1,400,927.27/1,271.14
  6. Step 6: Final answer
    x = 1,102.10

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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.