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Finding the Fourth Proportional to 393,407.44, 589,584.08 and 368,213.20

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Solution

The fourth proportional to 393,407.44, 589,584.08 and 368,213.20 is: 551,826.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,407.44 : 589,584.08 = 368,213.20 : x
  2. Step 2: Convert to fraction form
    393,407.44/589,584.08 = 368,213.20/x
  3. Step 3: Cross multiply
    393,407.44x = 589,584.08 × 368,213.20
  4. Step 4: Simplify right side
    393,407.44x = 217,092,640,765.86
  5. Step 5: Solve for x
    x = 217,092,640,765.86/393,407.44
  6. Step 6: Final answer
    x = 551,826.47

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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.