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Finding the Fourth Proportional to 330,060.80, 495,091.20 and 211,962.80

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Solution

The fourth proportional to 330,060.80, 495,091.20 and 211,962.80 is: 317,944.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,060.80 : 495,091.20 = 211,962.80 : x
  2. Step 2: Convert to fraction form
    330,060.80/495,091.20 = 211,962.80/x
  3. Step 3: Cross multiply
    330,060.80x = 495,091.20 × 211,962.80
  4. Step 4: Simplify right side
    330,060.80x = 104,940,917,007.36
  5. Step 5: Solve for x
    x = 104,940,917,007.36/330,060.80
  6. Step 6: Final answer
    x = 317,944.20

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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.