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Finding the Fourth Proportional to 958.29, 1,321.76 and 674.25

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Solution

The fourth proportional to 958.29, 1,321.76 and 674.25 is: 929.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.29 : 1,321.76 = 674.25 : x
  2. Step 2: Convert to fraction form
    958.29/1,321.76 = 674.25/x
  3. Step 3: Cross multiply
    958.29x = 1,321.76 × 674.25
  4. Step 4: Simplify right side
    958.29x = 891,193.31
  5. Step 5: Solve for x
    x = 891,193.31/958.29
  6. Step 6: Final answer
    x = 929.98

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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.