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Finding the Fourth Proportional to 285,958.13, 428,937.21 and 75,596.09

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Solution

The fourth proportional to 285,958.13, 428,937.21 and 75,596.09 is: 113,394.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,958.13 : 428,937.21 = 75,596.09 : x
  2. Step 2: Convert to fraction form
    285,958.13/428,937.21 = 75,596.09/x
  3. Step 3: Cross multiply
    285,958.13x = 428,937.21 × 75,596.09
  4. Step 4: Simplify right side
    285,958.13x = 32,425,973,786.82
  5. Step 5: Solve for x
    x = 32,425,973,786.82/285,958.13
  6. Step 6: Final answer
    x = 113,394.13

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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.