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Finding the Fourth Proportional to 664,424.80, 996,601.42 and 327,129.16

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Solution

The fourth proportional to 664,424.80, 996,601.42 and 327,129.16 is: 490,676.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,424.80 : 996,601.42 = 327,129.16 : x
  2. Step 2: Convert to fraction form
    664,424.80/996,601.42 = 327,129.16/x
  3. Step 3: Cross multiply
    664,424.80x = 996,601.42 × 327,129.16
  4. Step 4: Simplify right side
    664,424.80x = 326,017,385,379.41
  5. Step 5: Solve for x
    x = 326,017,385,379.41/664,424.80
  6. Step 6: Final answer
    x = 490,676.12

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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.