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Finding the Fourth Proportional to 318,920, 440,076.60 and 196,392.92

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Solution

The fourth proportional to 318,920, 440,076.60 and 196,392.92 is: 271,001.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,920 : 440,076.60 = 196,392.92 : x
  2. Step 2: Convert to fraction form
    318,920/440,076.60 = 196,392.92/x
  3. Step 3: Cross multiply
    318,920x = 440,076.60 × 196,392.92
  4. Step 4: Simplify right side
    318,920x = 86,427,928,497.67
  5. Step 5: Solve for x
    x = 86,427,928,497.67/318,920
  6. Step 6: Final answer
    x = 271,001.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.