Home / 2,785.12-4,177.60-1,141.20

Finding the Fourth Proportional to 2,785.12, 4,177.60 and 1,141.20

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Solution

The fourth proportional to 2,785.12, 4,177.60 and 1,141.20 is: 1,711.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.12 : 4,177.60 = 1,141.20 : x
  2. Step 2: Convert to fraction form
    2,785.12/4,177.60 = 1,141.20/x
  3. Step 3: Cross multiply
    2,785.12x = 4,177.60 × 1,141.20
  4. Step 4: Simplify right side
    2,785.12x = 4,767,477.12
  5. Step 5: Solve for x
    x = 4,767,477.12/2,785.12
  6. Step 6: Final answer
    x = 1,711.77

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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.