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Finding the Fourth Proportional to 611.61, 844.38 and 445.65

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Solution

The fourth proportional to 611.61, 844.38 and 445.65 is: 615.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.61 : 844.38 = 445.65 : x
  2. Step 2: Convert to fraction form
    611.61/844.38 = 445.65/x
  3. Step 3: Cross multiply
    611.61x = 844.38 × 445.65
  4. Step 4: Simplify right side
    611.61x = 376,297.95
  5. Step 5: Solve for x
    x = 376,297.95/611.61
  6. Step 6: Final answer
    x = 615.26

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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.