Home / 1,071.33-1,480.90-985.23

Finding the Fourth Proportional to 1,071.33, 1,480.90 and 985.23

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Solution

The fourth proportional to 1,071.33, 1,480.90 and 985.23 is: 1,361.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.33 : 1,480.90 = 985.23 : x
  2. Step 2: Convert to fraction form
    1,071.33/1,480.90 = 985.23/x
  3. Step 3: Cross multiply
    1,071.33x = 1,480.90 × 985.23
  4. Step 4: Simplify right side
    1,071.33x = 1,459,019.70
  5. Step 5: Solve for x
    x = 1,459,019.70/1,071.33
  6. Step 6: Final answer
    x = 1,361.88

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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.