Home / 461,320.20-691,980.30-128,896.20

Finding the Fourth Proportional to 461,320.20, 691,980.30 and 128,896.20

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Solution

The fourth proportional to 461,320.20, 691,980.30 and 128,896.20 is: 193,344.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,320.20 : 691,980.30 = 128,896.20 : x
  2. Step 2: Convert to fraction form
    461,320.20/691,980.30 = 128,896.20/x
  3. Step 3: Cross multiply
    461,320.20x = 691,980.30 × 128,896.20
  4. Step 4: Simplify right side
    461,320.20x = 89,193,631,144.86
  5. Step 5: Solve for x
    x = 89,193,631,144.86/461,320.20
  6. Step 6: Final answer
    x = 193,344.30

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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.