Home / 1,157.76-1,736.12-427.12

Finding the Fourth Proportional to 1,157.76, 1,736.12 and 427.12

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Solution

The fourth proportional to 1,157.76, 1,736.12 and 427.12 is: 640.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.76 : 1,736.12 = 427.12 : x
  2. Step 2: Convert to fraction form
    1,157.76/1,736.12 = 427.12/x
  3. Step 3: Cross multiply
    1,157.76x = 1,736.12 × 427.12
  4. Step 4: Simplify right side
    1,157.76x = 741,531.57
  5. Step 5: Solve for x
    x = 741,531.57/1,157.76
  6. Step 6: Final answer
    x = 640.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.