Home / 3,812.20-5,720.25-2,887.45

Finding the Fourth Proportional to 3,812.20, 5,720.25 and 2,887.45

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Solution

The fourth proportional to 3,812.20, 5,720.25 and 2,887.45 is: 4,332.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,812.20 : 5,720.25 = 2,887.45 : x
  2. Step 2: Convert to fraction form
    3,812.20/5,720.25 = 2,887.45/x
  3. Step 3: Cross multiply
    3,812.20x = 5,720.25 × 2,887.45
  4. Step 4: Simplify right side
    3,812.20x = 16,516,932.39
  5. Step 5: Solve for x
    x = 16,516,932.39/3,812.20
  6. Step 6: Final answer
    x = 4,332.65

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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.