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Finding the Fourth Proportional to 399,663.91, 551,536.33 and 215,902.54

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Solution

The fourth proportional to 399,663.91, 551,536.33 and 215,902.54 is: 297,945.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,663.91 : 551,536.33 = 215,902.54 : x
  2. Step 2: Convert to fraction form
    399,663.91/551,536.33 = 215,902.54/x
  3. Step 3: Cross multiply
    399,663.91x = 551,536.33 × 215,902.54
  4. Step 4: Simplify right side
    399,663.91x = 119,078,093,248.95
  5. Step 5: Solve for x
    x = 119,078,093,248.95/399,663.91
  6. Step 6: Final answer
    x = 297,945.57

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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.