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Finding the Fourth Proportional to 635.71, 877.37 and 386.98

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Solution

The fourth proportional to 635.71, 877.37 and 386.98 is: 534.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.71 : 877.37 = 386.98 : x
  2. Step 2: Convert to fraction form
    635.71/877.37 = 386.98/x
  3. Step 3: Cross multiply
    635.71x = 877.37 × 386.98
  4. Step 4: Simplify right side
    635.71x = 339,521.97
  5. Step 5: Solve for x
    x = 339,521.97/635.71
  6. Step 6: Final answer
    x = 534.09

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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.