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Finding the Fourth Proportional to 425,876.46, 638,027.36 and 215,010.78

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Solution

The fourth proportional to 425,876.46, 638,027.36 and 215,010.78 is: 322,118.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,876.46 : 638,027.36 = 215,010.78 : x
  2. Step 2: Convert to fraction form
    425,876.46/638,027.36 = 215,010.78/x
  3. Step 3: Cross multiply
    425,876.46x = 638,027.36 × 215,010.78
  4. Step 4: Simplify right side
    425,876.46x = 137,182,760,334.94
  5. Step 5: Solve for x
    x = 137,182,760,334.94/425,876.46
  6. Step 6: Final answer
    x = 322,118.67

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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.