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Finding the Fourth Proportional to 356,647.28, 534,378 and 251,243.60

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Solution

The fourth proportional to 356,647.28, 534,378 and 251,243.60 is: 376,447.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,647.28 : 534,378 = 251,243.60 : x
  2. Step 2: Convert to fraction form
    356,647.28/534,378 = 251,243.60/x
  3. Step 3: Cross multiply
    356,647.28x = 534,378 × 251,243.60
  4. Step 4: Simplify right side
    356,647.28x = 134,259,052,480.80
  5. Step 5: Solve for x
    x = 134,259,052,480.80/356,647.28
  6. Step 6: Final answer
    x = 376,447.71

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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.