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Finding the Fourth Proportional to 351,974.95, 485,255.54 and 279,617.92

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Solution

The fourth proportional to 351,974.95, 485,255.54 and 279,617.92 is: 385,499.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,974.95 : 485,255.54 = 279,617.92 : x
  2. Step 2: Convert to fraction form
    351,974.95/485,255.54 = 279,617.92/x
  3. Step 3: Cross multiply
    351,974.95x = 485,255.54 × 279,617.92
  4. Step 4: Simplify right side
    351,974.95x = 135,686,144,249.18
  5. Step 5: Solve for x
    x = 135,686,144,249.18/351,974.95
  6. Step 6: Final answer
    x = 385,499.44

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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.