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Finding the Fourth Proportional to 326,111.85, 489,167.78 and 326,111.85

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Solution

The fourth proportional to 326,111.85, 489,167.78 and 326,111.85 is: 489,167.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,111.85 : 489,167.78 = 326,111.85 : x
  2. Step 2: Convert to fraction form
    326,111.85/489,167.78 = 326,111.85/x
  3. Step 3: Cross multiply
    326,111.85x = 489,167.78 × 326,111.85
  4. Step 4: Simplify right side
    326,111.85x = 159,523,408,065.63
  5. Step 5: Solve for x
    x = 159,523,408,065.63/326,111.85
  6. Step 6: Final answer
    x = 489,167.78

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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.