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Finding the Fourth Proportional to 617.44, 851.86 and 368.80

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Solution

The fourth proportional to 617.44, 851.86 and 368.80 is: 508.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.44 : 851.86 = 368.80 : x
  2. Step 2: Convert to fraction form
    617.44/851.86 = 368.80/x
  3. Step 3: Cross multiply
    617.44x = 851.86 × 368.80
  4. Step 4: Simplify right side
    617.44x = 314,164.12
  5. Step 5: Solve for x
    x = 314,164.12/617.44
  6. Step 6: Final answer
    x = 508.82

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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.