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Finding the Fourth Proportional to 490,213.60, 734,542.80 and 323,807.20

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Solution

The fourth proportional to 490,213.60, 734,542.80 and 323,807.20 is: 485,197.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,213.60 : 734,542.80 = 323,807.20 : x
  2. Step 2: Convert to fraction form
    490,213.60/734,542.80 = 323,807.20/x
  3. Step 3: Cross multiply
    490,213.60x = 734,542.80 × 323,807.20
  4. Step 4: Simplify right side
    490,213.60x = 237,850,247,348.16
  5. Step 5: Solve for x
    x = 237,850,247,348.16/490,213.60
  6. Step 6: Final answer
    x = 485,197.16

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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.