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Finding the Fourth Proportional to 399,734.56, 551,456.51 and 238,495.86

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Solution

The fourth proportional to 399,734.56, 551,456.51 and 238,495.86 is: 329,018.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,734.56 : 551,456.51 = 238,495.86 : x
  2. Step 2: Convert to fraction form
    399,734.56/551,456.51 = 238,495.86/x
  3. Step 3: Cross multiply
    399,734.56x = 551,456.51 × 238,495.86
  4. Step 4: Simplify right side
    399,734.56x = 131,520,093,412.57
  5. Step 5: Solve for x
    x = 131,520,093,412.57/399,734.56
  6. Step 6: Final answer
    x = 329,018.57

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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.