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Finding the Fourth Proportional to 425,797.20, 638,698.11 and 126,280.38

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Solution

The fourth proportional to 425,797.20, 638,698.11 and 126,280.38 is: 189,421.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,797.20 : 638,698.11 = 126,280.38 : x
  2. Step 2: Convert to fraction form
    425,797.20/638,698.11 = 126,280.38/x
  3. Step 3: Cross multiply
    425,797.20x = 638,698.11 × 126,280.38
  4. Step 4: Simplify right side
    425,797.20x = 80,655,040,036.08
  5. Step 5: Solve for x
    x = 80,655,040,036.08/425,797.20
  6. Step 6: Final answer
    x = 189,421.26

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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.