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Finding the Fourth Proportional to 490,122.90, 734,200.20 and 330,690.60

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Solution

The fourth proportional to 490,122.90, 734,200.20 and 330,690.60 is: 495,371.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,122.90 : 734,200.20 = 330,690.60 : x
  2. Step 2: Convert to fraction form
    490,122.90/734,200.20 = 330,690.60/x
  3. Step 3: Cross multiply
    490,122.90x = 734,200.20 × 330,690.60
  4. Step 4: Simplify right side
    490,122.90x = 242,793,104,658.12
  5. Step 5: Solve for x
    x = 242,793,104,658.12/490,122.90
  6. Step 6: Final answer
    x = 495,371.88

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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.