Home / 215,930.58-321,679.74-206,215.21

Finding the Fourth Proportional to 215,930.58, 321,679.74 and 206,215.21

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Solution

The fourth proportional to 215,930.58, 321,679.74 and 206,215.21 is: 307,206.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,930.58 : 321,679.74 = 206,215.21 : x
  2. Step 2: Convert to fraction form
    215,930.58/321,679.74 = 206,215.21/x
  3. Step 3: Cross multiply
    215,930.58x = 321,679.74 × 206,215.21
  4. Step 4: Simplify right side
    215,930.58x = 66,335,255,136.85
  5. Step 5: Solve for x
    x = 66,335,255,136.85/215,930.58
  6. Step 6: Final answer
    x = 307,206.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.