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Finding the Fourth Proportional to 279,496.74, 385,686.05 and 158,640.49

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Solution

The fourth proportional to 279,496.74, 385,686.05 and 158,640.49 is: 218,912.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,496.74 : 385,686.05 = 158,640.49 : x
  2. Step 2: Convert to fraction form
    279,496.74/385,686.05 = 158,640.49/x
  3. Step 3: Cross multiply
    279,496.74x = 385,686.05 × 158,640.49
  4. Step 4: Simplify right side
    279,496.74x = 61,185,422,200.75
  5. Step 5: Solve for x
    x = 61,185,422,200.75/279,496.74
  6. Step 6: Final answer
    x = 218,912.83

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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.