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Finding the Fourth Proportional to 2,859.70, 4,279.95 and 1,995.70

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Solution

The fourth proportional to 2,859.70, 4,279.95 and 1,995.70 is: 2,986.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.70 : 4,279.95 = 1,995.70 : x
  2. Step 2: Convert to fraction form
    2,859.70/4,279.95 = 1,995.70/x
  3. Step 3: Cross multiply
    2,859.70x = 4,279.95 × 1,995.70
  4. Step 4: Simplify right side
    2,859.70x = 8,541,496.22
  5. Step 5: Solve for x
    x = 8,541,496.22/2,859.70
  6. Step 6: Final answer
    x = 2,986.85

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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.