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Finding the Fourth Proportional to 399,884.43, 551,840.64 and 218,597.16

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Solution

The fourth proportional to 399,884.43, 551,840.64 and 218,597.16 is: 301,664.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,884.43 : 551,840.64 = 218,597.16 : x
  2. Step 2: Convert to fraction form
    399,884.43/551,840.64 = 218,597.16/x
  3. Step 3: Cross multiply
    399,884.43x = 551,840.64 × 218,597.16
  4. Step 4: Simplify right side
    399,884.43x = 120,630,796,676.58
  5. Step 5: Solve for x
    x = 120,630,796,676.58/399,884.43
  6. Step 6: Final answer
    x = 301,664.15

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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.