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Finding the Fourth Proportional to 674.99, 925.40 and 662.68

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Solution

The fourth proportional to 674.99, 925.40 and 662.68 is: 908.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.99 : 925.40 = 662.68 : x
  2. Step 2: Convert to fraction form
    674.99/925.40 = 662.68/x
  3. Step 3: Cross multiply
    674.99x = 925.40 × 662.68
  4. Step 4: Simplify right side
    674.99x = 613,249.86
  5. Step 5: Solve for x
    x = 613,249.86/674.99
  6. Step 6: Final answer
    x = 908.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.