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Finding the Fourth Proportional to 279,243.20, 418,864.80 and 248,916.80

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Solution

The fourth proportional to 279,243.20, 418,864.80 and 248,916.80 is: 373,375.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,243.20 : 418,864.80 = 248,916.80 : x
  2. Step 2: Convert to fraction form
    279,243.20/418,864.80 = 248,916.80/x
  3. Step 3: Cross multiply
    279,243.20x = 418,864.80 × 248,916.80
  4. Step 4: Simplify right side
    279,243.20x = 104,262,485,648.64
  5. Step 5: Solve for x
    x = 104,262,485,648.64/279,243.20
  6. Step 6: Final answer
    x = 373,375.20

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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.