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Finding the Fourth Proportional to 399,269.62, 550,983.49 and 217,972.72

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Solution

The fourth proportional to 399,269.62, 550,983.49 and 217,972.72 is: 300,797.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,269.62 : 550,983.49 = 217,972.72 : x
  2. Step 2: Convert to fraction form
    399,269.62/550,983.49 = 217,972.72/x
  3. Step 3: Cross multiply
    399,269.62x = 550,983.49 × 217,972.72
  4. Step 4: Simplify right side
    399,269.62x = 120,099,369,990.39
  5. Step 5: Solve for x
    x = 120,099,369,990.39/399,269.62
  6. Step 6: Final answer
    x = 300,797.67

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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.