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Finding the Fourth Proportional to 279,807.12, 386,245.80 and 166,608

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Solution

The fourth proportional to 279,807.12, 386,245.80 and 166,608 is: 229,985.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,807.12 : 386,245.80 = 166,608 : x
  2. Step 2: Convert to fraction form
    279,807.12/386,245.80 = 166,608/x
  3. Step 3: Cross multiply
    279,807.12x = 386,245.80 × 166,608
  4. Step 4: Simplify right side
    279,807.12x = 64,351,640,246.40
  5. Step 5: Solve for x
    x = 64,351,640,246.40/279,807.12
  6. Step 6: Final answer
    x = 229,985.71

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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.