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Finding the Fourth Proportional to 279,969.39, 386,288.48 and 171,045.69

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Solution

The fourth proportional to 279,969.39, 386,288.48 and 171,045.69 is: 236,000.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,969.39 : 386,288.48 = 171,045.69 : x
  2. Step 2: Convert to fraction form
    279,969.39/386,288.48 = 171,045.69/x
  3. Step 3: Cross multiply
    279,969.39x = 386,288.48 × 171,045.69
  4. Step 4: Simplify right side
    279,969.39x = 66,072,978,745.42
  5. Step 5: Solve for x
    x = 66,072,978,745.42/279,969.39
  6. Step 6: Final answer
    x = 236,000.72

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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.