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Finding the Fourth Proportional to 399,670.44, 551,528.10 and 218,379.48

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Solution

The fourth proportional to 399,670.44, 551,528.10 and 218,379.48 is: 301,354.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,670.44 : 551,528.10 = 218,379.48 : x
  2. Step 2: Convert to fraction form
    399,670.44/551,528.10 = 218,379.48/x
  3. Step 3: Cross multiply
    399,670.44x = 551,528.10 × 218,379.48
  4. Step 4: Simplify right side
    399,670.44x = 120,442,419,683.39
  5. Step 5: Solve for x
    x = 120,442,419,683.39/399,670.44
  6. Step 6: Final answer
    x = 301,354.34

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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.