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Finding the Fourth Proportional to 797.88, 1,195.74 and 408

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Solution

The fourth proportional to 797.88, 1,195.74 and 408 is: 611.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.88 : 1,195.74 = 408 : x
  2. Step 2: Convert to fraction form
    797.88/1,195.74 = 408/x
  3. Step 3: Cross multiply
    797.88x = 1,195.74 × 408
  4. Step 4: Simplify right side
    797.88x = 487,861.92
  5. Step 5: Solve for x
    x = 487,861.92/797.88
  6. Step 6: Final answer
    x = 611.45

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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.