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Finding the Fourth Proportional to 279,628.60, 419,442.90 and 92,640.10

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Solution

The fourth proportional to 279,628.60, 419,442.90 and 92,640.10 is: 138,960.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,628.60 : 419,442.90 = 92,640.10 : x
  2. Step 2: Convert to fraction form
    279,628.60/419,442.90 = 92,640.10/x
  3. Step 3: Cross multiply
    279,628.60x = 419,442.90 × 92,640.10
  4. Step 4: Simplify right side
    279,628.60x = 38,857,232,200.29
  5. Step 5: Solve for x
    x = 38,857,232,200.29/279,628.60
  6. Step 6: Final answer
    x = 138,960.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.