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Finding the Fourth Proportional to 326,353.68, 489,518.19 and 89,690.19

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Solution

The fourth proportional to 326,353.68, 489,518.19 and 89,690.19 is: 134,531.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,353.68 : 489,518.19 = 89,690.19 : x
  2. Step 2: Convert to fraction form
    326,353.68/489,518.19 = 89,690.19/x
  3. Step 3: Cross multiply
    326,353.68x = 489,518.19 × 89,690.19
  4. Step 4: Simplify right side
    326,353.68x = 43,904,979,469.56
  5. Step 5: Solve for x
    x = 43,904,979,469.56/326,353.68
  6. Step 6: Final answer
    x = 134,531.90

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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.