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Finding the Fourth Proportional to 330,391.72, 495,411.90 and 130,704.04

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Solution

The fourth proportional to 330,391.72, 495,411.90 and 130,704.04 is: 195,986.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,391.72 : 495,411.90 = 130,704.04 : x
  2. Step 2: Convert to fraction form
    330,391.72/495,411.90 = 130,704.04/x
  3. Step 3: Cross multiply
    330,391.72x = 495,411.90 × 130,704.04
  4. Step 4: Simplify right side
    330,391.72x = 64,752,336,794.08
  5. Step 5: Solve for x
    x = 64,752,336,794.08/330,391.72
  6. Step 6: Final answer
    x = 195,986.56

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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.