Home / 3,155.20-4,729.20-1,857.76

Finding the Fourth Proportional to 3,155.20, 4,729.20 and 1,857.76

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Solution

The fourth proportional to 3,155.20, 4,729.20 and 1,857.76 is: 2,784.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,155.20 : 4,729.20 = 1,857.76 : x
  2. Step 2: Convert to fraction form
    3,155.20/4,729.20 = 1,857.76/x
  3. Step 3: Cross multiply
    3,155.20x = 4,729.20 × 1,857.76
  4. Step 4: Simplify right side
    3,155.20x = 8,785,718.59
  5. Step 5: Solve for x
    x = 8,785,718.59/3,155.20
  6. Step 6: Final answer
    x = 2,784.52

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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.