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Finding the Fourth Proportional to 318,872.77, 440,027.79 and 198,011.46

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Solution

The fourth proportional to 318,872.77, 440,027.79 and 198,011.46 is: 273,245.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,872.77 : 440,027.79 = 198,011.46 : x
  2. Step 2: Convert to fraction form
    318,872.77/440,027.79 = 198,011.46/x
  3. Step 3: Cross multiply
    318,872.77x = 440,027.79 × 198,011.46
  4. Step 4: Simplify right side
    318,872.77x = 87,130,545,138.47
  5. Step 5: Solve for x
    x = 87,130,545,138.47/318,872.77
  6. Step 6: Final answer
    x = 273,245.49

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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.