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Finding the Fourth Proportional to 279,885.78, 385,937.15 and 189,084.09

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Solution

The fourth proportional to 279,885.78, 385,937.15 and 189,084.09 is: 260,729.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,885.78 : 385,937.15 = 189,084.09 : x
  2. Step 2: Convert to fraction form
    279,885.78/385,937.15 = 189,084.09/x
  3. Step 3: Cross multiply
    279,885.78x = 385,937.15 × 189,084.09
  4. Step 4: Simplify right side
    279,885.78x = 72,974,573,859.52
  5. Step 5: Solve for x
    x = 72,974,573,859.52/279,885.78
  6. Step 6: Final answer
    x = 260,729.84

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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.