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Finding the Fourth Proportional to 215,680.80, 323,521.20 and 196,327.20

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Solution

The fourth proportional to 215,680.80, 323,521.20 and 196,327.20 is: 294,490.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,680.80 : 323,521.20 = 196,327.20 : x
  2. Step 2: Convert to fraction form
    215,680.80/323,521.20 = 196,327.20/x
  3. Step 3: Cross multiply
    215,680.80x = 323,521.20 × 196,327.20
  4. Step 4: Simplify right side
    215,680.80x = 63,516,011,336.64
  5. Step 5: Solve for x
    x = 63,516,011,336.64/215,680.80
  6. Step 6: Final answer
    x = 294,490.80

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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.