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Finding the Fourth Proportional to 627, 865.44 and 472.20

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Solution

The fourth proportional to 627, 865.44 and 472.20 is: 651.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    627 : 865.44 = 472.20 : x
  2. Step 2: Convert to fraction form
    627/865.44 = 472.20/x
  3. Step 3: Cross multiply
    627x = 865.44 × 472.20
  4. Step 4: Simplify right side
    627x = 408,660.77
  5. Step 5: Solve for x
    x = 408,660.77/627
  6. Step 6: Final answer
    x = 651.77

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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.