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Finding the Fourth Proportional to 958.48, 1,321.84 and 659.58

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Solution

The fourth proportional to 958.48, 1,321.84 and 659.58 is: 909.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.48 : 1,321.84 = 659.58 : x
  2. Step 2: Convert to fraction form
    958.48/1,321.84 = 659.58/x
  3. Step 3: Cross multiply
    958.48x = 1,321.84 × 659.58
  4. Step 4: Simplify right side
    958.48x = 871,859.23
  5. Step 5: Solve for x
    x = 871,859.23/958.48
  6. Step 6: Final answer
    x = 909.63

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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.