Home / 1,110.28-1,531.91-711.76

Finding the Fourth Proportional to 1,110.28, 1,531.91 and 711.76

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Solution

The fourth proportional to 1,110.28, 1,531.91 and 711.76 is: 982.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.28 : 1,531.91 = 711.76 : x
  2. Step 2: Convert to fraction form
    1,110.28/1,531.91 = 711.76/x
  3. Step 3: Cross multiply
    1,110.28x = 1,531.91 × 711.76
  4. Step 4: Simplify right side
    1,110.28x = 1,090,344.60
  5. Step 5: Solve for x
    x = 1,090,344.60/1,110.28
  6. Step 6: Final answer
    x = 982.05

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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.