Home / 1,282.19-1,769.36-722.66

Finding the Fourth Proportional to 1,282.19, 1,769.36 and 722.66

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Solution

The fourth proportional to 1,282.19, 1,769.36 and 722.66 is: 997.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.19 : 1,769.36 = 722.66 : x
  2. Step 2: Convert to fraction form
    1,282.19/1,769.36 = 722.66/x
  3. Step 3: Cross multiply
    1,282.19x = 1,769.36 × 722.66
  4. Step 4: Simplify right side
    1,282.19x = 1,278,642.08
  5. Step 5: Solve for x
    x = 1,278,642.08/1,282.19
  6. Step 6: Final answer
    x = 997.23

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1.5x scale

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.