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Finding the Fourth Proportional to 326,585.46, 489,909.17 and 126,921.27

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Solution

The fourth proportional to 326,585.46, 489,909.17 and 126,921.27 is: 190,393.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,585.46 : 489,909.17 = 126,921.27 : x
  2. Step 2: Convert to fraction form
    326,585.46/489,909.17 = 126,921.27/x
  3. Step 3: Cross multiply
    326,585.46x = 489,909.17 × 126,921.27
  4. Step 4: Simplify right side
    326,585.46x = 62,179,894,041.05
  5. Step 5: Solve for x
    x = 62,179,894,041.05/326,585.46
  6. Step 6: Final answer
    x = 190,393.94

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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.