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Finding the Fourth Proportional to 627.08, 865.40 and 347.36

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Solution

The fourth proportional to 627.08, 865.40 and 347.36 is: 479.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.08 : 865.40 = 347.36 : x
  2. Step 2: Convert to fraction form
    627.08/865.40 = 347.36/x
  3. Step 3: Cross multiply
    627.08x = 865.40 × 347.36
  4. Step 4: Simplify right side
    627.08x = 300,605.34
  5. Step 5: Solve for x
    x = 300,605.34/627.08
  6. Step 6: Final answer
    x = 479.37

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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.