Home / 1,121.16-1,548.68-862.36

Finding the Fourth Proportional to 1,121.16, 1,548.68 and 862.36

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Solution

The fourth proportional to 1,121.16, 1,548.68 and 862.36 is: 1,191.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.16 : 1,548.68 = 862.36 : x
  2. Step 2: Convert to fraction form
    1,121.16/1,548.68 = 862.36/x
  3. Step 3: Cross multiply
    1,121.16x = 1,548.68 × 862.36
  4. Step 4: Simplify right side
    1,121.16x = 1,335,519.68
  5. Step 5: Solve for x
    x = 1,335,519.68/1,121.16
  6. Step 6: Final answer
    x = 1,191.19

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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.