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Finding the Fourth Proportional to 627.62, 864.99 and 479.97

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Solution

The fourth proportional to 627.62, 864.99 and 479.97 is: 661.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.62 : 864.99 = 479.97 : x
  2. Step 2: Convert to fraction form
    627.62/864.99 = 479.97/x
  3. Step 3: Cross multiply
    627.62x = 864.99 × 479.97
  4. Step 4: Simplify right side
    627.62x = 415,169.25
  5. Step 5: Solve for x
    x = 415,169.25/627.62
  6. Step 6: Final answer
    x = 661.50

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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.