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Finding the Fourth Proportional to 1,173.82, 1,759.21 and 479.68

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Solution

The fourth proportional to 1,173.82, 1,759.21 and 479.68 is: 718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.82 : 1,759.21 = 479.68 : x
  2. Step 2: Convert to fraction form
    1,173.82/1,759.21 = 479.68/x
  3. Step 3: Cross multiply
    1,173.82x = 1,759.21 × 479.68
  4. Step 4: Simplify right side
    1,173.82x = 843,857.85
  5. Step 5: Solve for x
    x = 843,857.85/1,173.82
  6. Step 6: Final answer
    x = 718.90

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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.