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Finding the Fourth Proportional to 611,971.68, 915,991.92 and 326,949.60

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Solution

The fourth proportional to 611,971.68, 915,991.92 and 326,949.60 is: 489,374.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,971.68 : 915,991.92 = 326,949.60 : x
  2. Step 2: Convert to fraction form
    611,971.68/915,991.92 = 326,949.60/x
  3. Step 3: Cross multiply
    611,971.68x = 915,991.92 × 326,949.60
  4. Step 4: Simplify right side
    611,971.68x = 299,483,191,847.23
  5. Step 5: Solve for x
    x = 299,483,191,847.23/611,971.68
  6. Step 6: Final answer
    x = 489,374.27

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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.