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Finding the Fourth Proportional to 635.25, 876.50 and 386.57

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Solution

The fourth proportional to 635.25, 876.50 and 386.57 is: 533.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.25 : 876.50 = 386.57 : x
  2. Step 2: Convert to fraction form
    635.25/876.50 = 386.57/x
  3. Step 3: Cross multiply
    635.25x = 876.50 × 386.57
  4. Step 4: Simplify right side
    635.25x = 338,827.85
  5. Step 5: Solve for x
    x = 338,827.85/635.25
  6. Step 6: Final answer
    x = 533.37

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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.