Home / 4,279.59-5,905.78-2,391.21

Finding the Fourth Proportional to 4,279.59, 5,905.78 and 2,391.21

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Solution

The fourth proportional to 4,279.59, 5,905.78 and 2,391.21 is: 3,299.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,279.59 : 5,905.78 = 2,391.21 : x
  2. Step 2: Convert to fraction form
    4,279.59/5,905.78 = 2,391.21/x
  3. Step 3: Cross multiply
    4,279.59x = 5,905.78 × 2,391.21
  4. Step 4: Simplify right side
    4,279.59x = 14,121,948.24
  5. Step 5: Solve for x
    x = 14,121,948.24/4,279.59
  6. Step 6: Final answer
    x = 3,299.84

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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.