Home / 2,861.17-4,291.91-913.22

Finding the Fourth Proportional to 2,861.17, 4,291.91 and 913.22

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Solution

The fourth proportional to 2,861.17, 4,291.91 and 913.22 is: 1,369.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.17 : 4,291.91 = 913.22 : x
  2. Step 2: Convert to fraction form
    2,861.17/4,291.91 = 913.22/x
  3. Step 3: Cross multiply
    2,861.17x = 4,291.91 × 913.22
  4. Step 4: Simplify right side
    2,861.17x = 3,919,464.21
  5. Step 5: Solve for x
    x = 3,919,464.21/2,861.17
  6. Step 6: Final answer
    x = 1,369.88

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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.