Home / 215,930.01-321,678.90-206,214.65

Finding the Fourth Proportional to 215,930.01, 321,678.90 and 206,214.65

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Solution

The fourth proportional to 215,930.01, 321,678.90 and 206,214.65 is: 307,205.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,930.01 : 321,678.90 = 206,214.65 : x
  2. Step 2: Convert to fraction form
    215,930.01/321,678.90 = 206,214.65/x
  3. Step 3: Cross multiply
    215,930.01x = 321,678.90 × 206,214.65
  4. Step 4: Simplify right side
    215,930.01x = 66,334,901,775.89
  5. Step 5: Solve for x
    x = 66,334,901,775.89/215,930.01
  6. Step 6: Final answer
    x = 307,205.57

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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.