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Finding the Fourth Proportional to 462,821.78, 638,685.60 and 261,617.78

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Solution

The fourth proportional to 462,821.78, 638,685.60 and 261,617.78 is: 361,027.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    462,821.78 : 638,685.60 = 261,617.78 : x
  2. Step 2: Convert to fraction form
    462,821.78/638,685.60 = 261,617.78/x
  3. Step 3: Cross multiply
    462,821.78x = 638,685.60 × 261,617.78
  4. Step 4: Simplify right side
    462,821.78x = 167,091,508,789.97
  5. Step 5: Solve for x
    x = 167,091,508,789.97/462,821.78
  6. Step 6: Final answer
    x = 361,027.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.