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Finding the Fourth Proportional to 3,239.80, 4,859.70 and 2,591.80

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Solution

The fourth proportional to 3,239.80, 4,859.70 and 2,591.80 is: 3,887.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,239.80 : 4,859.70 = 2,591.80 : x
  2. Step 2: Convert to fraction form
    3,239.80/4,859.70 = 2,591.80/x
  3. Step 3: Cross multiply
    3,239.80x = 4,859.70 × 2,591.80
  4. Step 4: Simplify right side
    3,239.80x = 12,595,370.46
  5. Step 5: Solve for x
    x = 12,595,370.46/3,239.80
  6. Step 6: Final answer
    x = 3,887.70

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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.