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Finding the Fourth Proportional to 664,410.80, 996,713.40 and 215,055.20

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Solution

The fourth proportional to 664,410.80, 996,713.40 and 215,055.20 is: 322,614.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,410.80 : 996,713.40 = 215,055.20 : x
  2. Step 2: Convert to fraction form
    664,410.80/996,713.40 = 215,055.20/x
  3. Step 3: Cross multiply
    664,410.80x = 996,713.40 × 215,055.20
  4. Step 4: Simplify right side
    664,410.80x = 214,348,399,579.68
  5. Step 5: Solve for x
    x = 214,348,399,579.68/664,410.80
  6. Step 6: Final answer
    x = 322,614.26

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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.