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Finding the Fourth Proportional to 279,513.52, 418,920.36 and 220,114.60

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Solution

The fourth proportional to 279,513.52, 418,920.36 and 220,114.60 is: 329,896.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,513.52 : 418,920.36 = 220,114.60 : x
  2. Step 2: Convert to fraction form
    279,513.52/418,920.36 = 220,114.60/x
  3. Step 3: Cross multiply
    279,513.52x = 418,920.36 × 220,114.60
  4. Step 4: Simplify right side
    279,513.52x = 92,210,487,473.26
  5. Step 5: Solve for x
    x = 92,210,487,473.26/279,513.52
  6. Step 6: Final answer
    x = 329,896.34

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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.