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Finding the Fourth Proportional to 326,438.82, 489,601.80 and 86,554.26

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Solution

The fourth proportional to 326,438.82, 489,601.80 and 86,554.26 is: 129,816.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,438.82 : 489,601.80 = 86,554.26 : x
  2. Step 2: Convert to fraction form
    326,438.82/489,601.80 = 86,554.26/x
  3. Step 3: Cross multiply
    326,438.82x = 489,601.80 × 86,554.26
  4. Step 4: Simplify right side
    326,438.82x = 42,377,121,493.67
  5. Step 5: Solve for x
    x = 42,377,121,493.67/326,438.82
  6. Step 6: Final answer
    x = 129,816.43

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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.