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Finding the Fourth Proportional to 399,722.58, 551,593.62 and 218,435.82

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Solution

The fourth proportional to 399,722.58, 551,593.62 and 218,435.82 is: 301,428.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,722.58 : 551,593.62 = 218,435.82 : x
  2. Step 2: Convert to fraction form
    399,722.58/551,593.62 = 218,435.82/x
  3. Step 3: Cross multiply
    399,722.58x = 551,593.62 × 218,435.82
  4. Step 4: Simplify right side
    399,722.58x = 120,487,804,691.47
  5. Step 5: Solve for x
    x = 120,487,804,691.47/399,722.58
  6. Step 6: Final answer
    x = 301,428.57

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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.