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Finding the Fourth Proportional to 958.48, 1,321.83 and 710.42

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Solution

The fourth proportional to 958.48, 1,321.83 and 710.42 is: 979.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.48 : 1,321.83 = 710.42 : x
  2. Step 2: Convert to fraction form
    958.48/1,321.83 = 710.42/x
  3. Step 3: Cross multiply
    958.48x = 1,321.83 × 710.42
  4. Step 4: Simplify right side
    958.48x = 939,047.61
  5. Step 5: Solve for x
    x = 939,047.61/958.48
  6. Step 6: Final answer
    x = 979.73

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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.