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Finding the Fourth Proportional to 326,774.40, 489,967.20 and 169,310.40

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Solution

The fourth proportional to 326,774.40, 489,967.20 and 169,310.40 is: 253,864.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,774.40 : 489,967.20 = 169,310.40 : x
  2. Step 2: Convert to fraction form
    326,774.40/489,967.20 = 169,310.40/x
  3. Step 3: Cross multiply
    326,774.40x = 489,967.20 × 169,310.40
  4. Step 4: Simplify right side
    326,774.40x = 82,956,542,618.88
  5. Step 5: Solve for x
    x = 82,956,542,618.88/326,774.40
  6. Step 6: Final answer
    x = 253,864.88

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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.