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Finding the Fourth Proportional to 632.02, 947.82 and 427.72

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Solution

The fourth proportional to 632.02, 947.82 and 427.72 is: 641.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.02 : 947.82 = 427.72 : x
  2. Step 2: Convert to fraction form
    632.02/947.82 = 427.72/x
  3. Step 3: Cross multiply
    632.02x = 947.82 × 427.72
  4. Step 4: Simplify right side
    632.02x = 405,401.57
  5. Step 5: Solve for x
    x = 405,401.57/632.02
  6. Step 6: Final answer
    x = 641.44

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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.