Home / 1,242.62-1,871.36-1,131.90

Finding the Fourth Proportional to 1,242.62, 1,871.36 and 1,131.90

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Solution

The fourth proportional to 1,242.62, 1,871.36 and 1,131.90 is: 1,704.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.62 : 1,871.36 = 1,131.90 : x
  2. Step 2: Convert to fraction form
    1,242.62/1,871.36 = 1,131.90/x
  3. Step 3: Cross multiply
    1,242.62x = 1,871.36 × 1,131.90
  4. Step 4: Simplify right side
    1,242.62x = 2,118,192.38
  5. Step 5: Solve for x
    x = 2,118,192.38/1,242.62
  6. Step 6: Final answer
    x = 1,704.62

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.