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Finding the Fourth Proportional to 279,212.64, 385,226.40 and 158,344.44

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Solution

The fourth proportional to 279,212.64, 385,226.40 and 158,344.44 is: 218,465.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,212.64 : 385,226.40 = 158,344.44 : x
  2. Step 2: Convert to fraction form
    279,212.64/385,226.40 = 158,344.44/x
  3. Step 3: Cross multiply
    279,212.64x = 385,226.40 × 158,344.44
  4. Step 4: Simplify right side
    279,212.64x = 60,998,458,581.22
  5. Step 5: Solve for x
    x = 60,998,458,581.22/279,212.64
  6. Step 6: Final answer
    x = 218,465.96

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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.