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Finding the Fourth Proportional to 279,499.26, 385,743.81 and 158,679.66

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Solution

The fourth proportional to 279,499.26, 385,743.81 and 158,679.66 is: 218,997.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,499.26 : 385,743.81 = 158,679.66 : x
  2. Step 2: Convert to fraction form
    279,499.26/385,743.81 = 158,679.66/x
  3. Step 3: Cross multiply
    279,499.26x = 385,743.81 × 158,679.66
  4. Step 4: Simplify right side
    279,499.26x = 61,209,696,617.90
  5. Step 5: Solve for x
    x = 61,209,696,617.90/279,499.26
  6. Step 6: Final answer
    x = 218,997.71

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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.