Home / 2,781.27-4,170.51-931.77

Finding the Fourth Proportional to 2,781.27, 4,170.51 and 931.77

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Solution

The fourth proportional to 2,781.27, 4,170.51 and 931.77 is: 1,397.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.27 : 4,170.51 = 931.77 : x
  2. Step 2: Convert to fraction form
    2,781.27/4,170.51 = 931.77/x
  3. Step 3: Cross multiply
    2,781.27x = 4,170.51 × 931.77
  4. Step 4: Simplify right side
    2,781.27x = 3,885,956.10
  5. Step 5: Solve for x
    x = 3,885,956.10/2,781.27
  6. Step 6: Final answer
    x = 1,397.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.