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Finding the Fourth Proportional to 432.48, 640.62 and 427.62

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Solution

The fourth proportional to 432.48, 640.62 and 427.62 is: 633.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.48 : 640.62 = 427.62 : x
  2. Step 2: Convert to fraction form
    432.48/640.62 = 427.62/x
  3. Step 3: Cross multiply
    432.48x = 640.62 × 427.62
  4. Step 4: Simplify right side
    432.48x = 273,941.92
  5. Step 5: Solve for x
    x = 273,941.92/432.48
  6. Step 6: Final answer
    x = 633.42

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.