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Finding the Fourth Proportional to 399,659.32, 551,513.44 and 218,377.48

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Solution

The fourth proportional to 399,659.32, 551,513.44 and 218,377.48 is: 301,351.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,659.32 : 551,513.44 = 218,377.48 : x
  2. Step 2: Convert to fraction form
    399,659.32/551,513.44 = 218,377.48/x
  3. Step 3: Cross multiply
    399,659.32x = 551,513.44 × 218,377.48
  4. Step 4: Simplify right side
    399,659.32x = 120,438,115,213.33
  5. Step 5: Solve for x
    x = 120,438,115,213.33/399,659.32
  6. Step 6: Final answer
    x = 301,351.95

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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.