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Finding the Fourth Proportional to 399,076.75, 550,737.54 and 217,800.27

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Solution

The fourth proportional to 399,076.75, 550,737.54 and 217,800.27 is: 300,570.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,076.75 : 550,737.54 = 217,800.27 : x
  2. Step 2: Convert to fraction form
    399,076.75/550,737.54 = 217,800.27/x
  3. Step 3: Cross multiply
    399,076.75x = 550,737.54 × 217,800.27
  4. Step 4: Simplify right side
    399,076.75x = 119,950,784,911.14
  5. Step 5: Solve for x
    x = 119,950,784,911.14/399,076.75
  6. Step 6: Final answer
    x = 300,570.72

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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.