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Finding the Fourth Proportional to 3,052.19, 4,578.44 and 861.09

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Solution

The fourth proportional to 3,052.19, 4,578.44 and 861.09 is: 1,291.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,052.19 : 4,578.44 = 861.09 : x
  2. Step 2: Convert to fraction form
    3,052.19/4,578.44 = 861.09/x
  3. Step 3: Cross multiply
    3,052.19x = 4,578.44 × 861.09
  4. Step 4: Simplify right side
    3,052.19x = 3,942,444.59
  5. Step 5: Solve for x
    x = 3,942,444.59/3,052.19
  6. Step 6: Final answer
    x = 1,291.68

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.