Home / 811,974.30-1,217,961.45-212,934.30

Finding the Fourth Proportional to 811,974.30, 1,217,961.45 and 212,934.30

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Solution

The fourth proportional to 811,974.30, 1,217,961.45 and 212,934.30 is: 319,401.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,974.30 : 1,217,961.45 = 212,934.30 : x
  2. Step 2: Convert to fraction form
    811,974.30/1,217,961.45 = 212,934.30/x
  3. Step 3: Cross multiply
    811,974.30x = 1,217,961.45 × 212,934.30
  4. Step 4: Simplify right side
    811,974.30x = 259,345,768,782.74
  5. Step 5: Solve for x
    x = 259,345,768,782.74/811,974.30
  6. Step 6: Final answer
    x = 319,401.45

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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.