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Finding the Fourth Proportional to 722.25, 997.07 and 679.05

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Solution

The fourth proportional to 722.25, 997.07 and 679.05 is: 937.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.25 : 997.07 = 679.05 : x
  2. Step 2: Convert to fraction form
    722.25/997.07 = 679.05/x
  3. Step 3: Cross multiply
    722.25x = 997.07 × 679.05
  4. Step 4: Simplify right side
    722.25x = 677,056.99
  5. Step 5: Solve for x
    x = 677,056.99/722.25
  6. Step 6: Final answer
    x = 937.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.