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Finding the Fourth Proportional to 385,659.20, 579,871.20 and 324,833.60

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Solution

The fourth proportional to 385,659.20, 579,871.20 and 324,833.60 is: 488,414.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,659.20 : 579,871.20 = 324,833.60 : x
  2. Step 2: Convert to fraction form
    385,659.20/579,871.20 = 324,833.60/x
  3. Step 3: Cross multiply
    385,659.20x = 579,871.20 × 324,833.60
  4. Step 4: Simplify right side
    385,659.20x = 188,361,649,432.32
  5. Step 5: Solve for x
    x = 188,361,649,432.32/385,659.20
  6. Step 6: Final answer
    x = 488,414.77

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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.