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Finding the Fourth Proportional to 645.73, 968 and 414.68

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Solution

The fourth proportional to 645.73, 968 and 414.68 is: 621.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.73 : 968 = 414.68 : x
  2. Step 2: Convert to fraction form
    645.73/968 = 414.68/x
  3. Step 3: Cross multiply
    645.73x = 968 × 414.68
  4. Step 4: Simplify right side
    645.73x = 401,410.24
  5. Step 5: Solve for x
    x = 401,410.24/645.73
  6. Step 6: Final answer
    x = 621.64

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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.