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Finding the Fourth Proportional to 399,590.01, 551,445.05 and 238,538.54

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Solution

The fourth proportional to 399,590.01, 551,445.05 and 238,538.54 is: 329,189.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,590.01 : 551,445.05 = 238,538.54 : x
  2. Step 2: Convert to fraction form
    399,590.01/551,445.05 = 238,538.54/x
  3. Step 3: Cross multiply
    399,590.01x = 551,445.05 × 238,538.54
  4. Step 4: Simplify right side
    399,590.01x = 131,540,899,092.19
  5. Step 5: Solve for x
    x = 131,540,899,092.19/399,590.01
  6. Step 6: Final answer
    x = 329,189.66

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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.