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Finding the Fourth Proportional to 279,134.61, 385,118.87 and 158,266.41

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Solution

The fourth proportional to 279,134.61, 385,118.87 and 158,266.41 is: 218,358.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,134.61 : 385,118.87 = 158,266.41 : x
  2. Step 2: Convert to fraction form
    279,134.61/385,118.87 = 158,266.41/x
  3. Step 3: Cross multiply
    279,134.61x = 385,118.87 × 158,266.41
  4. Step 4: Simplify right side
    279,134.61x = 60,951,380,186.82
  5. Step 5: Solve for x
    x = 60,951,380,186.82/279,134.61
  6. Step 6: Final answer
    x = 218,358.38

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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.