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Finding the Fourth Proportional to 636.01, 877.62 and 356.21

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Solution

The fourth proportional to 636.01, 877.62 and 356.21 is: 491.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.01 : 877.62 = 356.21 : x
  2. Step 2: Convert to fraction form
    636.01/877.62 = 356.21/x
  3. Step 3: Cross multiply
    636.01x = 877.62 × 356.21
  4. Step 4: Simplify right side
    636.01x = 312,617.02
  5. Step 5: Solve for x
    x = 312,617.02/636.01
  6. Step 6: Final answer
    x = 491.53

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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.