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Finding the Fourth Proportional to 326,554.61, 489,889.32 and 149,079.56

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Solution

The fourth proportional to 326,554.61, 489,889.32 and 149,079.56 is: 223,645.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,554.61 : 489,889.32 = 149,079.56 : x
  2. Step 2: Convert to fraction form
    326,554.61/489,889.32 = 149,079.56/x
  3. Step 3: Cross multiply
    326,554.61x = 489,889.32 × 149,079.56
  4. Step 4: Simplify right side
    326,554.61x = 73,032,481,824.85
  5. Step 5: Solve for x
    x = 73,032,481,824.85/326,554.61
  6. Step 6: Final answer
    x = 223,645.54

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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.