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Finding the Fourth Proportional to 743.46, 1,115.87 and 397.09

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Solution

The fourth proportional to 743.46, 1,115.87 and 397.09 is: 595.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.46 : 1,115.87 = 397.09 : x
  2. Step 2: Convert to fraction form
    743.46/1,115.87 = 397.09/x
  3. Step 3: Cross multiply
    743.46x = 1,115.87 × 397.09
  4. Step 4: Simplify right side
    743.46x = 443,096.04
  5. Step 5: Solve for x
    x = 443,096.04/743.46
  6. Step 6: Final answer
    x = 595.99

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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.