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Finding the Fourth Proportional to 425,552.61, 638,327.75 and 126,056.54

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Solution

The fourth proportional to 425,552.61, 638,327.75 and 126,056.54 is: 189,084.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,552.61 : 638,327.75 = 126,056.54 : x
  2. Step 2: Convert to fraction form
    425,552.61/638,327.75 = 126,056.54/x
  3. Step 3: Cross multiply
    425,552.61x = 638,327.75 × 126,056.54
  4. Step 4: Simplify right side
    425,552.61x = 80,465,383,729.06
  5. Step 5: Solve for x
    x = 80,465,383,729.06/425,552.61
  6. Step 6: Final answer
    x = 189,084.46

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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.