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Finding the Fourth Proportional to 422.15, 632.77 and 202.64

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Solution

The fourth proportional to 422.15, 632.77 and 202.64 is: 303.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.15 : 632.77 = 202.64 : x
  2. Step 2: Convert to fraction form
    422.15/632.77 = 202.64/x
  3. Step 3: Cross multiply
    422.15x = 632.77 × 202.64
  4. Step 4: Simplify right side
    422.15x = 128,220.84
  5. Step 5: Solve for x
    x = 128,220.84/422.15
  6. Step 6: Final answer
    x = 303.74

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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.