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Finding the Fourth Proportional to 2,561.46, 3,842.19 and 830.22

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Solution

The fourth proportional to 2,561.46, 3,842.19 and 830.22 is: 1,245.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,561.46 : 3,842.19 = 830.22 : x
  2. Step 2: Convert to fraction form
    2,561.46/3,842.19 = 830.22/x
  3. Step 3: Cross multiply
    2,561.46x = 3,842.19 × 830.22
  4. Step 4: Simplify right side
    2,561.46x = 3,189,862.98
  5. Step 5: Solve for x
    x = 3,189,862.98/2,561.46
  6. Step 6: Final answer
    x = 1,245.33

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.