Home / 2,905.21-4,010.97-2,158.30

Finding the Fourth Proportional to 2,905.21, 4,010.97 and 2,158.30

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Solution

The fourth proportional to 2,905.21, 4,010.97 and 2,158.30 is: 2,979.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,905.21 : 4,010.97 = 2,158.30 : x
  2. Step 2: Convert to fraction form
    2,905.21/4,010.97 = 2,158.30/x
  3. Step 3: Cross multiply
    2,905.21x = 4,010.97 × 2,158.30
  4. Step 4: Simplify right side
    2,905.21x = 8,656,876.55
  5. Step 5: Solve for x
    x = 8,656,876.55/2,905.21
  6. Step 6: Final answer
    x = 2,979.78

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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.