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Finding the Fourth Proportional to 394,415.40, 591,623.10 and 372,642.60

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Solution

The fourth proportional to 394,415.40, 591,623.10 and 372,642.60 is: 558,963.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,415.40 : 591,623.10 = 372,642.60 : x
  2. Step 2: Convert to fraction form
    394,415.40/591,623.10 = 372,642.60/x
  3. Step 3: Cross multiply
    394,415.40x = 591,623.10 × 372,642.60
  4. Step 4: Simplify right side
    394,415.40x = 220,463,970,204.06
  5. Step 5: Solve for x
    x = 220,463,970,204.06/394,415.40
  6. Step 6: Final answer
    x = 558,963.90

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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.