Home / 1,282.09-1,769.43-722.70

Finding the Fourth Proportional to 1,282.09, 1,769.43 and 722.70

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Solution

The fourth proportional to 1,282.09, 1,769.43 and 722.70 is: 997.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.09 : 1,769.43 = 722.70 : x
  2. Step 2: Convert to fraction form
    1,282.09/1,769.43 = 722.70/x
  3. Step 3: Cross multiply
    1,282.09x = 1,769.43 × 722.70
  4. Step 4: Simplify right side
    1,282.09x = 1,278,767.06
  5. Step 5: Solve for x
    x = 1,278,767.06/1,282.09
  6. Step 6: Final answer
    x = 997.41

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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.