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Finding the Fourth Proportional to 1,157.24, 1,736.02 and 426.62

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Solution

The fourth proportional to 1,157.24, 1,736.02 and 426.62 is: 639.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.24 : 1,736.02 = 426.62 : x
  2. Step 2: Convert to fraction form
    1,157.24/1,736.02 = 426.62/x
  3. Step 3: Cross multiply
    1,157.24x = 1,736.02 × 426.62
  4. Step 4: Simplify right side
    1,157.24x = 740,620.85
  5. Step 5: Solve for x
    x = 740,620.85/1,157.24
  6. Step 6: Final answer
    x = 639.99

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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.