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Finding the Fourth Proportional to 279,940.91, 386,368.08 and 165,211.30

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Solution

The fourth proportional to 279,940.91, 386,368.08 and 165,211.30 is: 228,020.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,940.91 : 386,368.08 = 165,211.30 : x
  2. Step 2: Convert to fraction form
    279,940.91/386,368.08 = 165,211.30/x
  3. Step 3: Cross multiply
    279,940.91x = 386,368.08 × 165,211.30
  4. Step 4: Simplify right side
    279,940.91x = 63,832,372,775.30
  5. Step 5: Solve for x
    x = 63,832,372,775.30/279,940.91
  6. Step 6: Final answer
    x = 228,020.88

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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.