Home / 826,673.78-1,239,446.91-420,868.64

Finding the Fourth Proportional to 826,673.78, 1,239,446.91 and 420,868.64

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Solution

The fourth proportional to 826,673.78, 1,239,446.91 and 420,868.64 is: 631,015.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,673.78 : 1,239,446.91 = 420,868.64 : x
  2. Step 2: Convert to fraction form
    826,673.78/1,239,446.91 = 420,868.64/x
  3. Step 3: Cross multiply
    826,673.78x = 1,239,446.91 × 420,868.64
  4. Step 4: Simplify right side
    826,673.78x = 521,644,340,040.78
  5. Step 5: Solve for x
    x = 521,644,340,040.78/826,673.78
  6. Step 6: Final answer
    x = 631,015.95

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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.