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Finding the Fourth Proportional to 425,556.56, 638,480.64 and 145,270.64

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Solution

The fourth proportional to 425,556.56, 638,480.64 and 145,270.64 is: 217,955.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,556.56 : 638,480.64 = 145,270.64 : x
  2. Step 2: Convert to fraction form
    425,556.56/638,480.64 = 145,270.64/x
  3. Step 3: Cross multiply
    425,556.56x = 638,480.64 × 145,270.64
  4. Step 4: Simplify right side
    425,556.56x = 92,752,491,200.41
  5. Step 5: Solve for x
    x = 92,752,491,200.41/425,556.56
  6. Step 6: Final answer
    x = 217,955.73

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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.