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Finding the Fourth Proportional to 419,385.10, 628,553.04 and 330,286.72

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Solution

The fourth proportional to 419,385.10, 628,553.04 and 330,286.72 is: 495,016.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,385.10 : 628,553.04 = 330,286.72 : x
  2. Step 2: Convert to fraction form
    419,385.10/628,553.04 = 330,286.72/x
  3. Step 3: Cross multiply
    419,385.10x = 628,553.04 × 330,286.72
  4. Step 4: Simplify right side
    419,385.10x = 207,602,721,927.63
  5. Step 5: Solve for x
    x = 207,602,721,927.63/419,385.10
  6. Step 6: Final answer
    x = 495,016.92

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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.