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Finding the Fourth Proportional to 279,661.48, 385,919.56 and 158,786.90

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Solution

The fourth proportional to 279,661.48, 385,919.56 and 158,786.90 is: 219,118.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,661.48 : 385,919.56 = 158,786.90 : x
  2. Step 2: Convert to fraction form
    279,661.48/385,919.56 = 158,786.90/x
  3. Step 3: Cross multiply
    279,661.48x = 385,919.56 × 158,786.90
  4. Step 4: Simplify right side
    279,661.48x = 61,278,970,581.76
  5. Step 5: Solve for x
    x = 61,278,970,581.76/279,661.48
  6. Step 6: Final answer
    x = 219,118.38

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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.