Home / 1,022.06-1,409.20-864.41

Finding the Fourth Proportional to 1,022.06, 1,409.20 and 864.41

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Solution

The fourth proportional to 1,022.06, 1,409.20 and 864.41 is: 1,191.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.06 : 1,409.20 = 864.41 : x
  2. Step 2: Convert to fraction form
    1,022.06/1,409.20 = 864.41/x
  3. Step 3: Cross multiply
    1,022.06x = 1,409.20 × 864.41
  4. Step 4: Simplify right side
    1,022.06x = 1,218,126.57
  5. Step 5: Solve for x
    x = 1,218,126.57/1,022.06
  6. Step 6: Final answer
    x = 1,191.83

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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.