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Finding the Fourth Proportional to 3,052.30, 4,578.62 and 861.20

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Solution

The fourth proportional to 3,052.30, 4,578.62 and 861.20 is: 1,291.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,052.30 : 4,578.62 = 861.20 : x
  2. Step 2: Convert to fraction form
    3,052.30/4,578.62 = 861.20/x
  3. Step 3: Cross multiply
    3,052.30x = 4,578.62 × 861.20
  4. Step 4: Simplify right side
    3,052.30x = 3,943,107.54
  5. Step 5: Solve for x
    x = 3,943,107.54/3,052.30
  6. Step 6: Final answer
    x = 1,291.85

Related Problems

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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.