Home / 756,052.20-1,134,078.30-378,138.60

Finding the Fourth Proportional to 756,052.20, 1,134,078.30 and 378,138.60

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Solution

The fourth proportional to 756,052.20, 1,134,078.30 and 378,138.60 is: 567,207.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    756,052.20 : 1,134,078.30 = 378,138.60 : x
  2. Step 2: Convert to fraction form
    756,052.20/1,134,078.30 = 378,138.60/x
  3. Step 3: Cross multiply
    756,052.20x = 1,134,078.30 × 378,138.60
  4. Step 4: Simplify right side
    756,052.20x = 428,838,780,652.38
  5. Step 5: Solve for x
    x = 428,838,780,652.38/756,052.20
  6. Step 6: Final answer
    x = 567,207.90

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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.