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Finding the Fourth Proportional to 635.39, 876.58 and 402.38

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Solution

The fourth proportional to 635.39, 876.58 and 402.38 is: 555.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.39 : 876.58 = 402.38 : x
  2. Step 2: Convert to fraction form
    635.39/876.58 = 402.38/x
  3. Step 3: Cross multiply
    635.39x = 876.58 × 402.38
  4. Step 4: Simplify right side
    635.39x = 352,712.87
  5. Step 5: Solve for x
    x = 352,712.87/635.39
  6. Step 6: Final answer
    x = 555.12

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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.