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Finding the Fourth Proportional to 635.81, 877.45 and 356.03

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Solution

The fourth proportional to 635.81, 877.45 and 356.03 is: 491.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.81 : 877.45 = 356.03 : x
  2. Step 2: Convert to fraction form
    635.81/877.45 = 356.03/x
  3. Step 3: Cross multiply
    635.81x = 877.45 × 356.03
  4. Step 4: Simplify right side
    635.81x = 312,397.87
  5. Step 5: Solve for x
    x = 312,397.87/635.81
  6. Step 6: Final answer
    x = 491.34

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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.