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Finding the Fourth Proportional to 3,052.40, 4,578.60 and 861.10

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Solution

The fourth proportional to 3,052.40, 4,578.60 and 861.10 is: 1,291.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,052.40 : 4,578.60 = 861.10 : x
  2. Step 2: Convert to fraction form
    3,052.40/4,578.60 = 861.10/x
  3. Step 3: Cross multiply
    3,052.40x = 4,578.60 × 861.10
  4. Step 4: Simplify right side
    3,052.40x = 3,942,632.46
  5. Step 5: Solve for x
    x = 3,942,632.46/3,052.40
  6. Step 6: Final answer
    x = 1,291.65

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.