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Finding the Fourth Proportional to 326,604.11, 489,780.20 and 126,898.20

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Solution

The fourth proportional to 326,604.11, 489,780.20 and 126,898.20 is: 190,298.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,604.11 : 489,780.20 = 126,898.20 : x
  2. Step 2: Convert to fraction form
    326,604.11/489,780.20 = 126,898.20/x
  3. Step 3: Cross multiply
    326,604.11x = 489,780.20 × 126,898.20
  4. Step 4: Simplify right side
    326,604.11x = 62,152,225,141.15
  5. Step 5: Solve for x
    x = 62,152,225,141.15/326,604.11
  6. Step 6: Final answer
    x = 190,298.36

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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.