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Finding the Fourth Proportional to 635.24, 876.89 and 386.63

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Solution

The fourth proportional to 635.24, 876.89 and 386.63 is: 533.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.24 : 876.89 = 386.63 : x
  2. Step 2: Convert to fraction form
    635.24/876.89 = 386.63/x
  3. Step 3: Cross multiply
    635.24x = 876.89 × 386.63
  4. Step 4: Simplify right side
    635.24x = 339,025.66
  5. Step 5: Solve for x
    x = 339,025.66/635.24
  6. Step 6: Final answer
    x = 533.70

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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.