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Finding the Fourth Proportional to 399,016.79, 550,644.71 and 217,732.44

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Solution

The fourth proportional to 399,016.79, 550,644.71 and 217,732.44 is: 300,471.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,016.79 : 550,644.71 = 217,732.44 : x
  2. Step 2: Convert to fraction form
    399,016.79/550,644.71 = 217,732.44/x
  3. Step 3: Cross multiply
    399,016.79x = 550,644.71 × 217,732.44
  4. Step 4: Simplify right side
    399,016.79x = 119,893,216,281.39
  5. Step 5: Solve for x
    x = 119,893,216,281.39/399,016.79
  6. Step 6: Final answer
    x = 300,471.61

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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.