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Finding the Fourth Proportional to 399,279.18, 550,996.84 and 217,982.35

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Solution

The fourth proportional to 399,279.18, 550,996.84 and 217,982.35 is: 300,811.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,279.18 : 550,996.84 = 217,982.35 : x
  2. Step 2: Convert to fraction form
    399,279.18/550,996.84 = 217,982.35/x
  3. Step 3: Cross multiply
    399,279.18x = 550,996.84 × 217,982.35
  4. Step 4: Simplify right side
    399,279.18x = 120,107,586,025.77
  5. Step 5: Solve for x
    x = 120,107,586,025.77/399,279.18
  6. Step 6: Final answer
    x = 300,811.04

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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.