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Finding the Fourth Proportional to 611.85, 844 and 445.87

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Solution

The fourth proportional to 611.85, 844 and 445.87 is: 615.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.85 : 844 = 445.87 : x
  2. Step 2: Convert to fraction form
    611.85/844 = 445.87/x
  3. Step 3: Cross multiply
    611.85x = 844 × 445.87
  4. Step 4: Simplify right side
    611.85x = 376,314.28
  5. Step 5: Solve for x
    x = 376,314.28/611.85
  6. Step 6: Final answer
    x = 615.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.