Home / 2,780.67-4,170.06-931.35

Finding the Fourth Proportional to 2,780.67, 4,170.06 and 931.35

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Solution

The fourth proportional to 2,780.67, 4,170.06 and 931.35 is: 1,396.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.67 : 4,170.06 = 931.35 : x
  2. Step 2: Convert to fraction form
    2,780.67/4,170.06 = 931.35/x
  3. Step 3: Cross multiply
    2,780.67x = 4,170.06 × 931.35
  4. Step 4: Simplify right side
    2,780.67x = 3,883,785.38
  5. Step 5: Solve for x
    x = 3,883,785.38/2,780.67
  6. Step 6: Final answer
    x = 1,396.71

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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.