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Finding the Fourth Proportional to 330,040.80, 495,061.20 and 211,942.80

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Solution

The fourth proportional to 330,040.80, 495,061.20 and 211,942.80 is: 317,914.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,040.80 : 495,061.20 = 211,942.80 : x
  2. Step 2: Convert to fraction form
    330,040.80/495,061.20 = 211,942.80/x
  3. Step 3: Cross multiply
    330,040.80x = 495,061.20 × 211,942.80
  4. Step 4: Simplify right side
    330,040.80x = 104,924,656,899.36
  5. Step 5: Solve for x
    x = 104,924,656,899.36/330,040.80
  6. Step 6: Final answer
    x = 317,914.20

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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.