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Finding the Fourth Proportional to 399,250.91, 550,974.60 and 217,970.48

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Solution

The fourth proportional to 399,250.91, 550,974.60 and 217,970.48 is: 300,803.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,250.91 : 550,974.60 = 217,970.48 : x
  2. Step 2: Convert to fraction form
    399,250.91/550,974.60 = 217,970.48/x
  3. Step 3: Cross multiply
    399,250.91x = 550,974.60 × 217,970.48
  4. Step 4: Simplify right side
    399,250.91x = 120,096,199,407.25
  5. Step 5: Solve for x
    x = 120,096,199,407.25/399,250.91
  6. Step 6: Final answer
    x = 300,803.82

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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.