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Finding the Fourth Proportional to 279,744.78, 385,741.89 and 188,943.09

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Solution

The fourth proportional to 279,744.78, 385,741.89 and 188,943.09 is: 260,534.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,744.78 : 385,741.89 = 188,943.09 : x
  2. Step 2: Convert to fraction form
    279,744.78/385,741.89 = 188,943.09/x
  3. Step 3: Cross multiply
    279,744.78x = 385,741.89 × 188,943.09
  4. Step 4: Simplify right side
    279,744.78x = 72,883,264,639.04
  5. Step 5: Solve for x
    x = 72,883,264,639.04/279,744.78
  6. Step 6: Final answer
    x = 260,534.85

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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.