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Finding the Fourth Proportional to 3,312.92, 4,571.90 and 1,820.90

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Solution

The fourth proportional to 3,312.92, 4,571.90 and 1,820.90 is: 2,512.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.92 : 4,571.90 = 1,820.90 : x
  2. Step 2: Convert to fraction form
    3,312.92/4,571.90 = 1,820.90/x
  3. Step 3: Cross multiply
    3,312.92x = 4,571.90 × 1,820.90
  4. Step 4: Simplify right side
    3,312.92x = 8,324,940.75
  5. Step 5: Solve for x
    x = 8,324,940.75/3,312.92
  6. Step 6: Final answer
    x = 2,512.87

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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.