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Finding the Fourth Proportional to 678,067.48, 935,745 and 372,172.48

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Solution

The fourth proportional to 678,067.48, 935,745 and 372,172.48 is: 513,604.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,067.48 : 935,745 = 372,172.48 : x
  2. Step 2: Convert to fraction form
    678,067.48/935,745 = 372,172.48/x
  3. Step 3: Cross multiply
    678,067.48x = 935,745 × 372,172.48
  4. Step 4: Simplify right side
    678,067.48x = 348,258,537,297.60
  5. Step 5: Solve for x
    x = 348,258,537,297.60/678,067.48
  6. Step 6: Final answer
    x = 513,604.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.