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Finding the Fourth Proportional to 279,553.96, 385,780.65 and 158,694.19

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Solution

The fourth proportional to 279,553.96, 385,780.65 and 158,694.19 is: 218,995.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,553.96 : 385,780.65 = 158,694.19 : x
  2. Step 2: Convert to fraction form
    279,553.96/385,780.65 = 158,694.19/x
  3. Step 3: Cross multiply
    279,553.96x = 385,780.65 × 158,694.19
  4. Step 4: Simplify right side
    279,553.96x = 61,221,146,656.19
  5. Step 5: Solve for x
    x = 61,221,146,656.19/279,553.96
  6. Step 6: Final answer
    x = 218,995.81

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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.