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Finding the Fourth Proportional to 279,216.64, 385,231.96 and 158,348.44

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Solution

The fourth proportional to 279,216.64, 385,231.96 and 158,348.44 is: 218,471.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,216.64 : 385,231.96 = 158,348.44 : x
  2. Step 2: Convert to fraction form
    279,216.64/385,231.96 = 158,348.44/x
  3. Step 3: Cross multiply
    279,216.64x = 385,231.96 × 158,348.44
  4. Step 4: Simplify right side
    279,216.64x = 61,000,879,904.14
  5. Step 5: Solve for x
    x = 61,000,879,904.14/279,216.64
  6. Step 6: Final answer
    x = 218,471.51

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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.