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Finding the Fourth Proportional to 635.56, 877.05 and 355.79

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Solution

The fourth proportional to 635.56, 877.05 and 355.79 is: 490.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.56 : 877.05 = 355.79 : x
  2. Step 2: Convert to fraction form
    635.56/877.05 = 355.79/x
  3. Step 3: Cross multiply
    635.56x = 877.05 × 355.79
  4. Step 4: Simplify right side
    635.56x = 312,045.62
  5. Step 5: Solve for x
    x = 312,045.62/635.56
  6. Step 6: Final answer
    x = 490.98

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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.