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Finding the Fourth Proportional to 636.22, 877.38 and 423.16

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Solution

The fourth proportional to 636.22, 877.38 and 423.16 is: 583.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.22 : 877.38 = 423.16 : x
  2. Step 2: Convert to fraction form
    636.22/877.38 = 423.16/x
  3. Step 3: Cross multiply
    636.22x = 877.38 × 423.16
  4. Step 4: Simplify right side
    636.22x = 371,272.12
  5. Step 5: Solve for x
    x = 371,272.12/636.22
  6. Step 6: Final answer
    x = 583.56

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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.