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Finding the Fourth Proportional to 797.72, 1,195.86 and 455

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Solution

The fourth proportional to 797.72, 1,195.86 and 455 is: 682.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.72 : 1,195.86 = 455 : x
  2. Step 2: Convert to fraction form
    797.72/1,195.86 = 455/x
  3. Step 3: Cross multiply
    797.72x = 1,195.86 × 455
  4. Step 4: Simplify right side
    797.72x = 544,116.30
  5. Step 5: Solve for x
    x = 544,116.30/797.72
  6. Step 6: Final answer
    x = 682.09

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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.