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Finding the Fourth Proportional to 797.80, 1,196.24 and 386.16

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Solution

The fourth proportional to 797.80, 1,196.24 and 386.16 is: 579.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.80 : 1,196.24 = 386.16 : x
  2. Step 2: Convert to fraction form
    797.80/1,196.24 = 386.16/x
  3. Step 3: Cross multiply
    797.80x = 1,196.24 × 386.16
  4. Step 4: Simplify right side
    797.80x = 461,940.04
  5. Step 5: Solve for x
    x = 461,940.04/797.80
  6. Step 6: Final answer
    x = 579.02

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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.