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Finding the Fourth Proportional to 426,022.80, 638,924.64 and 126,432.48

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Solution

The fourth proportional to 426,022.80, 638,924.64 and 126,432.48 is: 189,616.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,022.80 : 638,924.64 = 126,432.48 : x
  2. Step 2: Convert to fraction form
    426,022.80/638,924.64 = 126,432.48/x
  3. Step 3: Cross multiply
    426,022.80x = 638,924.64 × 126,432.48
  4. Step 4: Simplify right side
    426,022.80x = 80,780,826,768.31
  5. Step 5: Solve for x
    x = 80,780,826,768.31/426,022.80
  6. Step 6: Final answer
    x = 189,616.21

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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.