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Finding the Fourth Proportional to 326,555.86, 489,891.20 and 149,080.81

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Solution

The fourth proportional to 326,555.86, 489,891.20 and 149,080.81 is: 223,647.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,555.86 : 489,891.20 = 149,080.81 : x
  2. Step 2: Convert to fraction form
    326,555.86/489,891.20 = 149,080.81/x
  3. Step 3: Cross multiply
    326,555.86x = 489,891.20 × 149,080.81
  4. Step 4: Simplify right side
    326,555.86x = 73,033,376,162.47
  5. Step 5: Solve for x
    x = 73,033,376,162.47/326,555.86
  6. Step 6: Final answer
    x = 223,647.42

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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.