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Finding the Fourth Proportional to 664,403.60, 996,751.20 and 215,145.20

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Solution

The fourth proportional to 664,403.60, 996,751.20 and 215,145.20 is: 322,765.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,403.60 : 996,751.20 = 215,145.20 : x
  2. Step 2: Convert to fraction form
    664,403.60/996,751.20 = 215,145.20/x
  3. Step 3: Cross multiply
    664,403.60x = 996,751.20 × 215,145.20
  4. Step 4: Simplify right side
    664,403.60x = 214,446,236,274.24
  5. Step 5: Solve for x
    x = 214,446,236,274.24/664,403.60
  6. Step 6: Final answer
    x = 322,765.01

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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.