Home / 2,785.20-4,176.12-935.80

Finding the Fourth Proportional to 2,785.20, 4,176.12 and 935.80

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Solution

The fourth proportional to 2,785.20, 4,176.12 and 935.80 is: 1,403.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.20 : 4,176.12 = 935.80 : x
  2. Step 2: Convert to fraction form
    2,785.20/4,176.12 = 935.80/x
  3. Step 3: Cross multiply
    2,785.20x = 4,176.12 × 935.80
  4. Step 4: Simplify right side
    2,785.20x = 3,908,013.10
  5. Step 5: Solve for x
    x = 3,908,013.10/2,785.20
  6. Step 6: Final answer
    x = 1,403.14

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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.