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Finding the Fourth Proportional to 664,389.60, 996,730.20 and 215,131.20

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Solution

The fourth proportional to 664,389.60, 996,730.20 and 215,131.20 is: 322,744.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,389.60 : 996,730.20 = 215,131.20 : x
  2. Step 2: Convert to fraction form
    664,389.60/996,730.20 = 215,131.20/x
  3. Step 3: Cross multiply
    664,389.60x = 996,730.20 × 215,131.20
  4. Step 4: Simplify right side
    664,389.60x = 214,427,764,002.24
  5. Step 5: Solve for x
    x = 214,427,764,002.24/664,389.60
  6. Step 6: Final answer
    x = 322,744.01

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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.