Home / 812,520.96-1,218,034.98-279,915.36

Finding the Fourth Proportional to 812,520.96, 1,218,034.98 and 279,915.36

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Solution

The fourth proportional to 812,520.96, 1,218,034.98 and 279,915.36 is: 419,615.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,520.96 : 1,218,034.98 = 279,915.36 : x
  2. Step 2: Convert to fraction form
    812,520.96/1,218,034.98 = 279,915.36/x
  3. Step 3: Cross multiply
    812,520.96x = 1,218,034.98 × 279,915.36
  4. Step 4: Simplify right side
    812,520.96x = 340,946,699,919.29
  5. Step 5: Solve for x
    x = 340,946,699,919.29/812,520.96
  6. Step 6: Final answer
    x = 419,615.88

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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.