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Finding the Fourth Proportional to 958.24, 1,320.72 and 725.44

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Solution

The fourth proportional to 958.24, 1,320.72 and 725.44 is: 999.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.24 : 1,320.72 = 725.44 : x
  2. Step 2: Convert to fraction form
    958.24/1,320.72 = 725.44/x
  3. Step 3: Cross multiply
    958.24x = 1,320.72 × 725.44
  4. Step 4: Simplify right side
    958.24x = 958,103.12
  5. Step 5: Solve for x
    x = 958,103.12/958.24
  6. Step 6: Final answer
    x = 999.86

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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.