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Finding the Fourth Proportional to 1,165.10, 1,747.67 and 299.39

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Solution

The fourth proportional to 1,165.10, 1,747.67 and 299.39 is: 449.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.10 : 1,747.67 = 299.39 : x
  2. Step 2: Convert to fraction form
    1,165.10/1,747.67 = 299.39/x
  3. Step 3: Cross multiply
    1,165.10x = 1,747.67 × 299.39
  4. Step 4: Simplify right side
    1,165.10x = 523,234.92
  5. Step 5: Solve for x
    x = 523,234.92/1,165.10
  6. Step 6: Final answer
    x = 449.09

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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.