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Finding the Fourth Proportional to 399,494.88, 551,299.65 and 218,206.92

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Solution

The fourth proportional to 399,494.88, 551,299.65 and 218,206.92 is: 301,123.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,494.88 : 551,299.65 = 218,206.92 : x
  2. Step 2: Convert to fraction form
    399,494.88/551,299.65 = 218,206.92/x
  3. Step 3: Cross multiply
    399,494.88x = 551,299.65 × 218,206.92
  4. Step 4: Simplify right side
    399,494.88x = 120,297,398,623.58
  5. Step 5: Solve for x
    x = 120,297,398,623.58/399,494.88
  6. Step 6: Final answer
    x = 301,123.76

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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.