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Finding the Fourth Proportional to 797.80, 1,101.18 and 518.02

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Solution

The fourth proportional to 797.80, 1,101.18 and 518.02 is: 715.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.80 : 1,101.18 = 518.02 : x
  2. Step 2: Convert to fraction form
    797.80/1,101.18 = 518.02/x
  3. Step 3: Cross multiply
    797.80x = 1,101.18 × 518.02
  4. Step 4: Simplify right side
    797.80x = 570,433.55
  5. Step 5: Solve for x
    x = 570,433.55/797.80
  6. Step 6: Final answer
    x = 715.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.