Home / 811,623.23-1,217,422.49-279,148.87

Finding the Fourth Proportional to 811,623.23, 1,217,422.49 and 279,148.87

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Solution

The fourth proportional to 811,623.23, 1,217,422.49 and 279,148.87 is: 418,719.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,623.23 : 1,217,422.49 = 279,148.87 : x
  2. Step 2: Convert to fraction form
    811,623.23/1,217,422.49 = 279,148.87/x
  3. Step 3: Cross multiply
    811,623.23x = 1,217,422.49 × 279,148.87
  4. Step 4: Simplify right side
    811,623.23x = 339,842,112,396.09
  5. Step 5: Solve for x
    x = 339,842,112,396.09/811,623.23
  6. Step 6: Final answer
    x = 418,719.06

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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.