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Finding the Fourth Proportional to 418,424.22, 627,600.78 and 165,635.97

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Solution

The fourth proportional to 418,424.22, 627,600.78 and 165,635.97 is: 248,439.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,424.22 : 627,600.78 = 165,635.97 : x
  2. Step 2: Convert to fraction form
    418,424.22/627,600.78 = 165,635.97/x
  3. Step 3: Cross multiply
    418,424.22x = 627,600.78 × 165,635.97
  4. Step 4: Simplify right side
    418,424.22x = 103,953,263,968.06
  5. Step 5: Solve for x
    x = 103,953,263,968.06/418,424.22
  6. Step 6: Final answer
    x = 248,439.88

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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.