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Finding the Fourth Proportional to 258,388.38, 387,657.90 and 158,612.58

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Solution

The fourth proportional to 258,388.38, 387,657.90 and 158,612.58 is: 237,965.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,388.38 : 387,657.90 = 158,612.58 : x
  2. Step 2: Convert to fraction form
    258,388.38/387,657.90 = 158,612.58/x
  3. Step 3: Cross multiply
    258,388.38x = 387,657.90 × 158,612.58
  4. Step 4: Simplify right side
    258,388.38x = 61,487,419,676.38
  5. Step 5: Solve for x
    x = 61,487,419,676.38/258,388.38
  6. Step 6: Final answer
    x = 237,965.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.