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Finding the Fourth Proportional to 215,087.20, 322,630.80 and 206,922.40

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Solution

The fourth proportional to 215,087.20, 322,630.80 and 206,922.40 is: 310,383.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,087.20 : 322,630.80 = 206,922.40 : x
  2. Step 2: Convert to fraction form
    215,087.20/322,630.80 = 206,922.40/x
  3. Step 3: Cross multiply
    215,087.20x = 322,630.80 × 206,922.40
  4. Step 4: Simplify right side
    215,087.20x = 66,759,539,449.92
  5. Step 5: Solve for x
    x = 66,759,539,449.92/215,087.20
  6. Step 6: Final answer
    x = 310,383.60

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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.