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Finding the Fourth Proportional to 399,886.88, 551,843.75 and 218,599.56

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Solution

The fourth proportional to 399,886.88, 551,843.75 and 218,599.56 is: 301,667.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,886.88 : 551,843.75 = 218,599.56 : x
  2. Step 2: Convert to fraction form
    399,886.88/551,843.75 = 218,599.56/x
  3. Step 3: Cross multiply
    399,886.88x = 551,843.75 × 218,599.56
  4. Step 4: Simplify right side
    399,886.88x = 120,632,801,485.25
  5. Step 5: Solve for x
    x = 120,632,801,485.25/399,886.88
  6. Step 6: Final answer
    x = 301,667.32

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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.