Home / 766,128.20-1,147,442.70-451,200.20

Finding the Fourth Proportional to 766,128.20, 1,147,442.70 and 451,200.20

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Solution

The fourth proportional to 766,128.20, 1,147,442.70 and 451,200.20 is: 675,769.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,128.20 : 1,147,442.70 = 451,200.20 : x
  2. Step 2: Convert to fraction form
    766,128.20/1,147,442.70 = 451,200.20/x
  3. Step 3: Cross multiply
    766,128.20x = 1,147,442.70 × 451,200.20
  4. Step 4: Simplify right side
    766,128.20x = 517,726,375,728.54
  5. Step 5: Solve for x
    x = 517,726,375,728.54/766,128.20
  6. Step 6: Final answer
    x = 675,769.90

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Double scale
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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.