Home / 1,931.27-2,664.09-1,221.81

Finding the Fourth Proportional to 1,931.27, 2,664.09 and 1,221.81

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Solution

The fourth proportional to 1,931.27, 2,664.09 and 1,221.81 is: 1,685.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.27 : 2,664.09 = 1,221.81 : x
  2. Step 2: Convert to fraction form
    1,931.27/2,664.09 = 1,221.81/x
  3. Step 3: Cross multiply
    1,931.27x = 2,664.09 × 1,221.81
  4. Step 4: Simplify right side
    1,931.27x = 3,255,011.80
  5. Step 5: Solve for x
    x = 3,255,011.80/1,931.27
  6. Step 6: Final answer
    x = 1,685.43

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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.