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Finding the Fourth Proportional to 471,817.40, 706,689.30 and 419,286.20

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Solution

The fourth proportional to 471,817.40, 706,689.30 and 419,286.20 is: 628,007.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    471,817.40 : 706,689.30 = 419,286.20 : x
  2. Step 2: Convert to fraction form
    471,817.40/706,689.30 = 419,286.20/x
  3. Step 3: Cross multiply
    471,817.40x = 706,689.30 × 419,286.20
  4. Step 4: Simplify right side
    471,817.40x = 296,305,071,177.66
  5. Step 5: Solve for x
    x = 296,305,071,177.66/471,817.40
  6. Step 6: Final answer
    x = 628,007.94

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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.