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Finding the Fourth Proportional to 285,518.34, 428,244.39 and 75,172.68

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Solution

The fourth proportional to 285,518.34, 428,244.39 and 75,172.68 is: 112,750.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,518.34 : 428,244.39 = 75,172.68 : x
  2. Step 2: Convert to fraction form
    285,518.34/428,244.39 = 75,172.68/x
  3. Step 3: Cross multiply
    285,518.34x = 428,244.39 × 75,172.68
  4. Step 4: Simplify right side
    285,518.34x = 32,192,278,491.27
  5. Step 5: Solve for x
    x = 32,192,278,491.27/285,518.34
  6. Step 6: Final answer
    x = 112,750.30

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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.