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Finding the Fourth Proportional to 627.05, 865.21 and 347.27

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Solution

The fourth proportional to 627.05, 865.21 and 347.27 is: 479.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.05 : 865.21 = 347.27 : x
  2. Step 2: Convert to fraction form
    627.05/865.21 = 347.27/x
  3. Step 3: Cross multiply
    627.05x = 865.21 × 347.27
  4. Step 4: Simplify right side
    627.05x = 300,459.74
  5. Step 5: Solve for x
    x = 300,459.74/627.05
  6. Step 6: Final answer
    x = 479.17

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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.