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Finding the Fourth Proportional to 326,593.48, 489,921.20 and 126,929.28

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Solution

The fourth proportional to 326,593.48, 489,921.20 and 126,929.28 is: 190,405.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,593.48 : 489,921.20 = 126,929.28 : x
  2. Step 2: Convert to fraction form
    326,593.48/489,921.20 = 126,929.28/x
  3. Step 3: Cross multiply
    326,593.48x = 489,921.20 × 126,929.28
  4. Step 4: Simplify right side
    326,593.48x = 62,185,345,172.74
  5. Step 5: Solve for x
    x = 62,185,345,172.74/326,593.48
  6. Step 6: Final answer
    x = 190,405.96

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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.