Home / 811,900.50-1,217,855.79-212,856.27

Finding the Fourth Proportional to 811,900.50, 1,217,855.79 and 212,856.27

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Solution

The fourth proportional to 811,900.50, 1,217,855.79 and 212,856.27 is: 319,285.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,900.50 : 1,217,855.79 = 212,856.27 : x
  2. Step 2: Convert to fraction form
    811,900.50/1,217,855.79 = 212,856.27/x
  3. Step 3: Cross multiply
    811,900.50x = 1,217,855.79 × 212,856.27
  4. Step 4: Simplify right side
    811,900.50x = 259,228,240,857.30
  5. Step 5: Solve for x
    x = 259,228,240,857.30/811,900.50
  6. Step 6: Final answer
    x = 319,285.73

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1.5x scale

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.