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Finding the Fourth Proportional to 866.85, 1,299.82 and 404.85

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Solution

The fourth proportional to 866.85, 1,299.82 and 404.85 is: 607.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.85 : 1,299.82 = 404.85 : x
  2. Step 2: Convert to fraction form
    866.85/1,299.82 = 404.85/x
  3. Step 3: Cross multiply
    866.85x = 1,299.82 × 404.85
  4. Step 4: Simplify right side
    866.85x = 526,232.13
  5. Step 5: Solve for x
    x = 526,232.13/866.85
  6. Step 6: Final answer
    x = 607.06

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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.