Home / 1,966.77-2,715.29-1,221.13

Finding the Fourth Proportional to 1,966.77, 2,715.29 and 1,221.13

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Solution

The fourth proportional to 1,966.77, 2,715.29 and 1,221.13 is: 1,685.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,966.77 : 2,715.29 = 1,221.13 : x
  2. Step 2: Convert to fraction form
    1,966.77/2,715.29 = 1,221.13/x
  3. Step 3: Cross multiply
    1,966.77x = 2,715.29 × 1,221.13
  4. Step 4: Simplify right side
    1,966.77x = 3,315,722.08
  5. Step 5: Solve for x
    x = 3,315,722.08/1,966.77
  6. Step 6: Final answer
    x = 1,685.87

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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.