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Finding the Fourth Proportional to 635.33, 876.39 and 402.59

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Solution

The fourth proportional to 635.33, 876.39 and 402.59 is: 555.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.33 : 876.39 = 402.59 : x
  2. Step 2: Convert to fraction form
    635.33/876.39 = 402.59/x
  3. Step 3: Cross multiply
    635.33x = 876.39 × 402.59
  4. Step 4: Simplify right side
    635.33x = 352,825.85
  5. Step 5: Solve for x
    x = 352,825.85/635.33
  6. Step 6: Final answer
    x = 555.34

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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.