Home / 811,205.38-1,215,950-305,547.56

Finding the Fourth Proportional to 811,205.38, 1,215,950 and 305,547.56

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Solution

The fourth proportional to 811,205.38, 1,215,950 and 305,547.56 is: 457,998.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,205.38 : 1,215,950 = 305,547.56 : x
  2. Step 2: Convert to fraction form
    811,205.38/1,215,950 = 305,547.56/x
  3. Step 3: Cross multiply
    811,205.38x = 1,215,950 × 305,547.56
  4. Step 4: Simplify right side
    811,205.38x = 371,530,555,582
  5. Step 5: Solve for x
    x = 371,530,555,582/811,205.38
  6. Step 6: Final answer
    x = 457,998.14

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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.