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Finding the Fourth Proportional to 399,242.33, 550,962.76 and 217,961.90

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Solution

The fourth proportional to 399,242.33, 550,962.76 and 217,961.90 is: 300,791.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,242.33 : 550,962.76 = 217,961.90 : x
  2. Step 2: Convert to fraction form
    399,242.33/550,962.76 = 217,961.90/x
  3. Step 3: Cross multiply
    399,242.33x = 550,962.76 × 217,961.90
  4. Step 4: Simplify right side
    399,242.33x = 120,088,892,273.08
  5. Step 5: Solve for x
    x = 120,088,892,273.08/399,242.33
  6. Step 6: Final answer
    x = 300,791.98

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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.