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Finding the Fourth Proportional to 399,803.88, 551,714.36 and 218,514.34

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Solution

The fourth proportional to 399,803.88, 551,714.36 and 218,514.34 is: 301,541.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,803.88 : 551,714.36 = 218,514.34 : x
  2. Step 2: Convert to fraction form
    399,803.88/551,714.36 = 218,514.34/x
  3. Step 3: Cross multiply
    399,803.88x = 551,714.36 × 218,514.34
  4. Step 4: Simplify right side
    399,803.88x = 120,557,495,392.78
  5. Step 5: Solve for x
    x = 120,557,495,392.78/399,803.88
  6. Step 6: Final answer
    x = 301,541.58

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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.