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Finding the Fourth Proportional to 636.71, 955.22 and 290.15

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Solution

The fourth proportional to 636.71, 955.22 and 290.15 is: 435.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.71 : 955.22 = 290.15 : x
  2. Step 2: Convert to fraction form
    636.71/955.22 = 290.15/x
  3. Step 3: Cross multiply
    636.71x = 955.22 × 290.15
  4. Step 4: Simplify right side
    636.71x = 277,150.86
  5. Step 5: Solve for x
    x = 277,150.86/636.71
  6. Step 6: Final answer
    x = 435.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.