Home / 811,221.68-1,216,903.08-212,180.24

Finding the Fourth Proportional to 811,221.68, 1,216,903.08 and 212,180.24

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Solution

The fourth proportional to 811,221.68, 1,216,903.08 and 212,180.24 is: 318,288.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,221.68 : 1,216,903.08 = 212,180.24 : x
  2. Step 2: Convert to fraction form
    811,221.68/1,216,903.08 = 212,180.24/x
  3. Step 3: Cross multiply
    811,221.68x = 1,216,903.08 × 212,180.24
  4. Step 4: Simplify right side
    811,221.68x = 258,202,787,571.14
  5. Step 5: Solve for x
    x = 258,202,787,571.14/811,221.68
  6. Step 6: Final answer
    x = 318,288.82

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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.