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Finding the Fourth Proportional to 330,004.80, 495,007.20 and 217,811.70

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Solution

The fourth proportional to 330,004.80, 495,007.20 and 217,811.70 is: 326,717.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,004.80 : 495,007.20 = 217,811.70 : x
  2. Step 2: Convert to fraction form
    330,004.80/495,007.20 = 217,811.70/x
  3. Step 3: Cross multiply
    330,004.80x = 495,007.20 × 217,811.70
  4. Step 4: Simplify right side
    330,004.80x = 107,818,359,744.24
  5. Step 5: Solve for x
    x = 107,818,359,744.24/330,004.80
  6. Step 6: Final answer
    x = 326,717.55

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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.