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Finding the Fourth Proportional to 1,244.93, 1,715.04 and 871.21

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Solution

The fourth proportional to 1,244.93, 1,715.04 and 871.21 is: 1,200.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.93 : 1,715.04 = 871.21 : x
  2. Step 2: Convert to fraction form
    1,244.93/1,715.04 = 871.21/x
  3. Step 3: Cross multiply
    1,244.93x = 1,715.04 × 871.21
  4. Step 4: Simplify right side
    1,244.93x = 1,494,160.00
  5. Step 5: Solve for x
    x = 1,494,160.00/1,244.93
  6. Step 6: Final answer
    x = 1,200.20

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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.