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Finding the Fourth Proportional to 399,642.29, 551,514.29 and 218,365.41

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Solution

The fourth proportional to 399,642.29, 551,514.29 and 218,365.41 is: 301,348.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,642.29 : 551,514.29 = 218,365.41 : x
  2. Step 2: Convert to fraction form
    399,642.29/551,514.29 = 218,365.41/x
  3. Step 3: Cross multiply
    399,642.29x = 551,514.29 × 218,365.41
  4. Step 4: Simplify right side
    399,642.29x = 120,431,642,964.88
  5. Step 5: Solve for x
    x = 120,431,642,964.88/399,642.29
  6. Step 6: Final answer
    x = 301,348.60

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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.