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Finding the Fourth Proportional to 326,356.65, 489,424.10 and 113,074.78

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Solution

The fourth proportional to 326,356.65, 489,424.10 and 113,074.78 is: 169,573.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,356.65 : 489,424.10 = 113,074.78 : x
  2. Step 2: Convert to fraction form
    326,356.65/489,424.10 = 113,074.78/x
  3. Step 3: Cross multiply
    326,356.65x = 489,424.10 × 113,074.78
  4. Step 4: Simplify right side
    326,356.65x = 55,341,523,890.39
  5. Step 5: Solve for x
    x = 55,341,523,890.39/326,356.65
  6. Step 6: Final answer
    x = 169,573.76

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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.