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Finding the Fourth Proportional to 394,433.40, 591,650.10 and 372,660.60

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Solution

The fourth proportional to 394,433.40, 591,650.10 and 372,660.60 is: 558,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,433.40 : 591,650.10 = 372,660.60 : x
  2. Step 2: Convert to fraction form
    394,433.40/591,650.10 = 372,660.60/x
  3. Step 3: Cross multiply
    394,433.40x = 591,650.10 × 372,660.60
  4. Step 4: Simplify right side
    394,433.40x = 220,484,681,256.06
  5. Step 5: Solve for x
    x = 220,484,681,256.06/394,433.40
  6. Step 6: Final answer
    x = 558,990.90

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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.