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Finding the Fourth Proportional to 399,241.40, 550,961.47 and 217,960.97

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Solution

The fourth proportional to 399,241.40, 550,961.47 and 217,960.97 is: 300,790.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,241.40 : 550,961.47 = 217,960.97 : x
  2. Step 2: Convert to fraction form
    399,241.40/550,961.47 = 217,960.97/x
  3. Step 3: Cross multiply
    399,241.40x = 550,961.47 × 217,960.97
  4. Step 4: Simplify right side
    399,241.40x = 120,088,093,134.12
  5. Step 5: Solve for x
    x = 120,088,093,134.12/399,241.40
  6. Step 6: Final answer
    x = 300,790.69

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1.5x scale

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.