Home / 1,021.12-1,409.26-958.56

Finding the Fourth Proportional to 1,021.12, 1,409.26 and 958.56

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Solution

The fourth proportional to 1,021.12, 1,409.26 and 958.56 is: 1,322.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.12 : 1,409.26 = 958.56 : x
  2. Step 2: Convert to fraction form
    1,021.12/1,409.26 = 958.56/x
  3. Step 3: Cross multiply
    1,021.12x = 1,409.26 × 958.56
  4. Step 4: Simplify right side
    1,021.12x = 1,350,860.27
  5. Step 5: Solve for x
    x = 1,350,860.27/1,021.12
  6. Step 6: Final answer
    x = 1,322.92

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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.