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Finding the Fourth Proportional to 326,614.39, 489,730.90 and 126,701.17

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Solution

The fourth proportional to 326,614.39, 489,730.90 and 126,701.17 is: 189,977.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,614.39 : 489,730.90 = 126,701.17 : x
  2. Step 2: Convert to fraction form
    326,614.39/489,730.90 = 126,701.17/x
  3. Step 3: Cross multiply
    326,614.39x = 489,730.90 × 126,701.17
  4. Step 4: Simplify right side
    326,614.39x = 62,049,477,381.65
  5. Step 5: Solve for x
    x = 62,049,477,381.65/326,614.39
  6. Step 6: Final answer
    x = 189,977.78

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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.