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Finding the Fourth Proportional to 392,445.05, 587,792.78 and 303,215.45

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Solution

The fourth proportional to 392,445.05, 587,792.78 and 303,215.45 is: 454,147.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,445.05 : 587,792.78 = 303,215.45 : x
  2. Step 2: Convert to fraction form
    392,445.05/587,792.78 = 303,215.45/x
  3. Step 3: Cross multiply
    392,445.05x = 587,792.78 × 303,215.45
  4. Step 4: Simplify right side
    392,445.05x = 178,227,850,778.37
  5. Step 5: Solve for x
    x = 178,227,850,778.37/392,445.05
  6. Step 6: Final answer
    x = 454,147.28

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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.