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Finding the Fourth Proportional to 419,380.10, 628,545.54 and 330,281.72

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Solution

The fourth proportional to 419,380.10, 628,545.54 and 330,281.72 is: 495,009.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,380.10 : 628,545.54 = 330,281.72 : x
  2. Step 2: Convert to fraction form
    419,380.10/628,545.54 = 330,281.72/x
  3. Step 3: Cross multiply
    419,380.10x = 628,545.54 × 330,281.72
  4. Step 4: Simplify right side
    419,380.10x = 207,597,102,049.53
  5. Step 5: Solve for x
    x = 207,597,102,049.53/419,380.10
  6. Step 6: Final answer
    x = 495,009.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.