Home / 3,415.20-4,707.68-2,857.52

Finding the Fourth Proportional to 3,415.20, 4,707.68 and 2,857.52

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Solution

The fourth proportional to 3,415.20, 4,707.68 and 2,857.52 is: 3,938.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.20 : 4,707.68 = 2,857.52 : x
  2. Step 2: Convert to fraction form
    3,415.20/4,707.68 = 2,857.52/x
  3. Step 3: Cross multiply
    3,415.20x = 4,707.68 × 2,857.52
  4. Step 4: Simplify right side
    3,415.20x = 13,452,289.75
  5. Step 5: Solve for x
    x = 13,452,289.75/3,415.20
  6. Step 6: Final answer
    x = 3,938.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.