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Finding the Fourth Proportional to 638,209.84, 880,716.24 and 351,722.56

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Solution

The fourth proportional to 638,209.84, 880,716.24 and 351,722.56 is: 485,369.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,209.84 : 880,716.24 = 351,722.56 : x
  2. Step 2: Convert to fraction form
    638,209.84/880,716.24 = 351,722.56/x
  3. Step 3: Cross multiply
    638,209.84x = 880,716.24 × 351,722.56
  4. Step 4: Simplify right side
    638,209.84x = 309,767,770,566.37
  5. Step 5: Solve for x
    x = 309,767,770,566.37/638,209.84
  6. Step 6: Final answer
    x = 485,369.78

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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.