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Finding the Fourth Proportional to 279,138.30, 418,707.45 and 251,144.70

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Solution

The fourth proportional to 279,138.30, 418,707.45 and 251,144.70 is: 376,717.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,138.30 : 418,707.45 = 251,144.70 : x
  2. Step 2: Convert to fraction form
    279,138.30/418,707.45 = 251,144.70/x
  3. Step 3: Cross multiply
    279,138.30x = 418,707.45 × 251,144.70
  4. Step 4: Simplify right side
    279,138.30x = 105,156,156,918.02
  5. Step 5: Solve for x
    x = 105,156,156,918.02/279,138.30
  6. Step 6: Final answer
    x = 376,717.05

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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.