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Finding the Fourth Proportional to 311,921.10, 467,881.65 and 279,261.90

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Solution

The fourth proportional to 311,921.10, 467,881.65 and 279,261.90 is: 418,892.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,921.10 : 467,881.65 = 279,261.90 : x
  2. Step 2: Convert to fraction form
    311,921.10/467,881.65 = 279,261.90/x
  3. Step 3: Cross multiply
    311,921.10x = 467,881.65 × 279,261.90
  4. Step 4: Simplify right side
    311,921.10x = 130,661,518,554.14
  5. Step 5: Solve for x
    x = 130,661,518,554.14/311,921.10
  6. Step 6: Final answer
    x = 418,892.85

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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.