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Finding the Fourth Proportional to 279,231.75, 385,310.66 and 158,334.39

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Solution

The fourth proportional to 279,231.75, 385,310.66 and 158,334.39 is: 218,484.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,231.75 : 385,310.66 = 158,334.39 : x
  2. Step 2: Convert to fraction form
    279,231.75/385,310.66 = 158,334.39/x
  3. Step 3: Cross multiply
    279,231.75x = 385,310.66 × 158,334.39
  4. Step 4: Simplify right side
    279,231.75x = 61,007,927,519.93
  5. Step 5: Solve for x
    x = 61,007,927,519.93/279,231.75
  6. Step 6: Final answer
    x = 218,484.92

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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.