Home / 2,780.44-4,170.05-931.82

Finding the Fourth Proportional to 2,780.44, 4,170.05 and 931.82

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Solution

The fourth proportional to 2,780.44, 4,170.05 and 931.82 is: 1,397.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.44 : 4,170.05 = 931.82 : x
  2. Step 2: Convert to fraction form
    2,780.44/4,170.05 = 931.82/x
  3. Step 3: Cross multiply
    2,780.44x = 4,170.05 × 931.82
  4. Step 4: Simplify right side
    2,780.44x = 3,885,727.90
  5. Step 5: Solve for x
    x = 3,885,727.90/2,780.44
  6. Step 6: Final answer
    x = 1,397.52

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1.5x scale

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.