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Finding the Fourth Proportional to 635.44, 876.63 and 386.74

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Solution

The fourth proportional to 635.44, 876.63 and 386.74 is: 533.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.44 : 876.63 = 386.74 : x
  2. Step 2: Convert to fraction form
    635.44/876.63 = 386.74/x
  3. Step 3: Cross multiply
    635.44x = 876.63 × 386.74
  4. Step 4: Simplify right side
    635.44x = 339,027.89
  5. Step 5: Solve for x
    x = 339,027.89/635.44
  6. Step 6: Final answer
    x = 533.53

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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.