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Finding the Fourth Proportional to 423,758.80, 635,636.28 and 143,469.52

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Solution

The fourth proportional to 423,758.80, 635,636.28 and 143,469.52 is: 215,203.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,758.80 : 635,636.28 = 143,469.52 : x
  2. Step 2: Convert to fraction form
    423,758.80/635,636.28 = 143,469.52/x
  3. Step 3: Cross multiply
    423,758.80x = 635,636.28 × 143,469.52
  4. Step 4: Simplify right side
    423,758.80x = 91,194,431,986.19
  5. Step 5: Solve for x
    x = 91,194,431,986.19/423,758.80
  6. Step 6: Final answer
    x = 215,203.63

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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.