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Finding the Fourth Proportional to 2,953.92, 4,431.12 and 762.62

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Solution

The fourth proportional to 2,953.92, 4,431.12 and 762.62 is: 1,143.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,953.92 : 4,431.12 = 762.62 : x
  2. Step 2: Convert to fraction form
    2,953.92/4,431.12 = 762.62/x
  3. Step 3: Cross multiply
    2,953.92x = 4,431.12 × 762.62
  4. Step 4: Simplify right side
    2,953.92x = 3,379,260.73
  5. Step 5: Solve for x
    x = 3,379,260.73/2,953.92
  6. Step 6: Final answer
    x = 1,143.99

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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.