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Finding the Fourth Proportional to 425.43, 640.53 and 376.97

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Solution

The fourth proportional to 425.43, 640.53 and 376.97 is: 567.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.43 : 640.53 = 376.97 : x
  2. Step 2: Convert to fraction form
    425.43/640.53 = 376.97/x
  3. Step 3: Cross multiply
    425.43x = 640.53 × 376.97
  4. Step 4: Simplify right side
    425.43x = 241,457.39
  5. Step 5: Solve for x
    x = 241,457.39/425.43
  6. Step 6: Final answer
    x = 567.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.