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Finding the Fourth Proportional to 664,430.78, 996,610.44 and 327,135.18

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Solution

The fourth proportional to 664,430.78, 996,610.44 and 327,135.18 is: 490,685.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,430.78 : 996,610.44 = 327,135.18 : x
  2. Step 2: Convert to fraction form
    664,430.78/996,610.44 = 327,135.18/x
  3. Step 3: Cross multiply
    664,430.78x = 996,610.44 × 327,135.18
  4. Step 4: Simplify right side
    664,430.78x = 326,026,335,679.28
  5. Step 5: Solve for x
    x = 326,026,335,679.28/664,430.78
  6. Step 6: Final answer
    x = 490,685.18

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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.