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Finding the Fourth Proportional to 398,891.53, 550,469.55 and 217,603.41

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Solution

The fourth proportional to 398,891.53, 550,469.55 and 217,603.41 is: 300,292.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,891.53 : 550,469.55 = 217,603.41 : x
  2. Step 2: Convert to fraction form
    398,891.53/550,469.55 = 217,603.41/x
  3. Step 3: Cross multiply
    398,891.53x = 550,469.55 × 217,603.41
  4. Step 4: Simplify right side
    398,891.53x = 119,784,051,181.17
  5. Step 5: Solve for x
    x = 119,784,051,181.17/398,891.53
  6. Step 6: Final answer
    x = 300,292.29

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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.