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Finding the Fourth Proportional to 326,618.82, 489,737.55 and 126,705.61

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Solution

The fourth proportional to 326,618.82, 489,737.55 and 126,705.61 is: 189,984.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,618.82 : 489,737.55 = 126,705.61 : x
  2. Step 2: Convert to fraction form
    326,618.82/489,737.55 = 126,705.61/x
  3. Step 3: Cross multiply
    326,618.82x = 489,737.55 × 126,705.61
  4. Step 4: Simplify right side
    326,618.82x = 62,052,495,012.66
  5. Step 5: Solve for x
    x = 62,052,495,012.66/326,618.82
  6. Step 6: Final answer
    x = 189,984.44

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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.