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Finding the Fourth Proportional to 279,697.68, 385,992.72 and 158,835.60

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Solution

The fourth proportional to 279,697.68, 385,992.72 and 158,835.60 is: 219,198.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,697.68 : 385,992.72 = 158,835.60 : x
  2. Step 2: Convert to fraction form
    279,697.68/385,992.72 = 158,835.60/x
  3. Step 3: Cross multiply
    279,697.68x = 385,992.72 × 158,835.60
  4. Step 4: Simplify right side
    279,697.68x = 61,309,385,276.83
  5. Step 5: Solve for x
    x = 61,309,385,276.83/279,697.68
  6. Step 6: Final answer
    x = 219,198.76

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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.