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Finding the Fourth Proportional to 1,145.81, 1,581.32 and 958.97

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Solution

The fourth proportional to 1,145.81, 1,581.32 and 958.97 is: 1,323.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.81 : 1,581.32 = 958.97 : x
  2. Step 2: Convert to fraction form
    1,145.81/1,581.32 = 958.97/x
  3. Step 3: Cross multiply
    1,145.81x = 1,581.32 × 958.97
  4. Step 4: Simplify right side
    1,145.81x = 1,516,438.44
  5. Step 5: Solve for x
    x = 1,516,438.44/1,145.81
  6. Step 6: Final answer
    x = 1,323.46

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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.