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Finding the Fourth Proportional to 399,548.45, 551,388.72 and 218,263.38

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Solution

The fourth proportional to 399,548.45, 551,388.72 and 218,263.38 is: 301,209.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,548.45 : 551,388.72 = 218,263.38 : x
  2. Step 2: Convert to fraction form
    399,548.45/551,388.72 = 218,263.38/x
  3. Step 3: Cross multiply
    399,548.45x = 551,388.72 × 218,263.38
  4. Step 4: Simplify right side
    399,548.45x = 120,347,967,896.46
  5. Step 5: Solve for x
    x = 120,347,967,896.46/399,548.45
  6. Step 6: Final answer
    x = 301,209.95

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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.