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Finding the Fourth Proportional to 215,906.80, 323,860.20 and 163,418.80

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Solution

The fourth proportional to 215,906.80, 323,860.20 and 163,418.80 is: 245,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,906.80 : 323,860.20 = 163,418.80 : x
  2. Step 2: Convert to fraction form
    215,906.80/323,860.20 = 163,418.80/x
  3. Step 3: Cross multiply
    215,906.80x = 323,860.20 × 163,418.80
  4. Step 4: Simplify right side
    215,906.80x = 52,924,845,251.76
  5. Step 5: Solve for x
    x = 52,924,845,251.76/215,906.80
  6. Step 6: Final answer
    x = 245,128.20

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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.