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Finding the Fourth Proportional to 279,092.40, 385,179.96 and 156,618.48

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Solution

The fourth proportional to 279,092.40, 385,179.96 and 156,618.48 is: 216,151.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,092.40 : 385,179.96 = 156,618.48 : x
  2. Step 2: Convert to fraction form
    279,092.40/385,179.96 = 156,618.48/x
  3. Step 3: Cross multiply
    279,092.40x = 385,179.96 × 156,618.48
  4. Step 4: Simplify right side
    279,092.40x = 60,326,299,861.66
  5. Step 5: Solve for x
    x = 60,326,299,861.66/279,092.40
  6. Step 6: Final answer
    x = 216,151.71

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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.