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Finding the Fourth Proportional to 425,647.68, 638,040.60 and 275,982.72

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Solution

The fourth proportional to 425,647.68, 638,040.60 and 275,982.72 is: 413,694.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,647.68 : 638,040.60 = 275,982.72 : x
  2. Step 2: Convert to fraction form
    425,647.68/638,040.60 = 275,982.72/x
  3. Step 3: Cross multiply
    425,647.68x = 638,040.60 × 275,982.72
  4. Step 4: Simplify right side
    425,647.68x = 176,088,180,258.43
  5. Step 5: Solve for x
    x = 176,088,180,258.43/425,647.68
  6. Step 6: Final answer
    x = 413,694.68

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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.