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Finding the Fourth Proportional to 399,937.33, 551,913.47 and 218,649.21

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Solution

The fourth proportional to 399,937.33, 551,913.47 and 218,649.21 is: 301,735.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,937.33 : 551,913.47 = 218,649.21 : x
  2. Step 2: Convert to fraction form
    399,937.33/551,913.47 = 218,649.21/x
  3. Step 3: Cross multiply
    399,937.33x = 551,913.47 × 218,649.21
  4. Step 4: Simplify right side
    399,937.33x = 120,675,444,203.86
  5. Step 5: Solve for x
    x = 120,675,444,203.86/399,937.33
  6. Step 6: Final answer
    x = 301,735.89

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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.