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Finding the Fourth Proportional to 635.34, 876.79 and 355.57

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Solution

The fourth proportional to 635.34, 876.79 and 355.57 is: 490.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.34 : 876.79 = 355.57 : x
  2. Step 2: Convert to fraction form
    635.34/876.79 = 355.57/x
  3. Step 3: Cross multiply
    635.34x = 876.79 × 355.57
  4. Step 4: Simplify right side
    635.34x = 311,760.22
  5. Step 5: Solve for x
    x = 311,760.22/635.34
  6. Step 6: Final answer
    x = 490.70

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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.