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Finding the Fourth Proportional to 3,312.98, 4,571.79 and 1,820.87

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Solution

The fourth proportional to 3,312.98, 4,571.79 and 1,820.87 is: 2,512.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.98 : 4,571.79 = 1,820.87 : x
  2. Step 2: Convert to fraction form
    3,312.98/4,571.79 = 1,820.87/x
  3. Step 3: Cross multiply
    3,312.98x = 4,571.79 × 1,820.87
  4. Step 4: Simplify right side
    3,312.98x = 8,324,635.26
  5. Step 5: Solve for x
    x = 8,324,635.26/3,312.98
  6. Step 6: Final answer
    x = 2,512.73

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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.