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Finding the Fourth Proportional to 635.51, 876.93 and 355.71

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Solution

The fourth proportional to 635.51, 876.93 and 355.71 is: 490.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.51 : 876.93 = 355.71 : x
  2. Step 2: Convert to fraction form
    635.51/876.93 = 355.71/x
  3. Step 3: Cross multiply
    635.51x = 876.93 × 355.71
  4. Step 4: Simplify right side
    635.51x = 311,932.77
  5. Step 5: Solve for x
    x = 311,932.77/635.51
  6. Step 6: Final answer
    x = 490.84

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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.