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Finding the Fourth Proportional to 326,556.36, 489,891.95 and 149,081.31

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Solution

The fourth proportional to 326,556.36, 489,891.95 and 149,081.31 is: 223,648.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,556.36 : 489,891.95 = 149,081.31 : x
  2. Step 2: Convert to fraction form
    326,556.36/489,891.95 = 149,081.31/x
  3. Step 3: Cross multiply
    326,556.36x = 489,891.95 × 149,081.31
  4. Step 4: Simplify right side
    326,556.36x = 73,033,733,664.45
  5. Step 5: Solve for x
    x = 73,033,733,664.45/326,556.36
  6. Step 6: Final answer
    x = 223,648.17

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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.