Home / 1,282.11-1,769.18-722.66

Finding the Fourth Proportional to 1,282.11, 1,769.18 and 722.66

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Solution

The fourth proportional to 1,282.11, 1,769.18 and 722.66 is: 997.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.11 : 1,769.18 = 722.66 : x
  2. Step 2: Convert to fraction form
    1,282.11/1,769.18 = 722.66/x
  3. Step 3: Cross multiply
    1,282.11x = 1,769.18 × 722.66
  4. Step 4: Simplify right side
    1,282.11x = 1,278,503.16
  5. Step 5: Solve for x
    x = 1,278,503.16/1,282.11
  6. Step 6: Final answer
    x = 997.19

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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.