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Finding the Fourth Proportional to 931.03, 1,286.16 and 744.28

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Solution

The fourth proportional to 931.03, 1,286.16 and 744.28 is: 1,028.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    931.03 : 1,286.16 = 744.28 : x
  2. Step 2: Convert to fraction form
    931.03/1,286.16 = 744.28/x
  3. Step 3: Cross multiply
    931.03x = 1,286.16 × 744.28
  4. Step 4: Simplify right side
    931.03x = 957,263.16
  5. Step 5: Solve for x
    x = 957,263.16/931.03
  6. Step 6: Final answer
    x = 1,028.18

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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.