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Finding the Fourth Proportional to 1,157.66, 1,736.53 and 426.83

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Solution

The fourth proportional to 1,157.66, 1,736.53 and 426.83 is: 640.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.66 : 1,736.53 = 426.83 : x
  2. Step 2: Convert to fraction form
    1,157.66/1,736.53 = 426.83/x
  3. Step 3: Cross multiply
    1,157.66x = 1,736.53 × 426.83
  4. Step 4: Simplify right side
    1,157.66x = 741,206.37
  5. Step 5: Solve for x
    x = 741,206.37/1,157.66
  6. Step 6: Final answer
    x = 640.27

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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.