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Finding the Fourth Proportional to 797.05, 1,100.21 and 498.16

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Solution

The fourth proportional to 797.05, 1,100.21 and 498.16 is: 687.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.05 : 1,100.21 = 498.16 : x
  2. Step 2: Convert to fraction form
    797.05/1,100.21 = 498.16/x
  3. Step 3: Cross multiply
    797.05x = 1,100.21 × 498.16
  4. Step 4: Simplify right side
    797.05x = 548,080.61
  5. Step 5: Solve for x
    x = 548,080.61/797.05
  6. Step 6: Final answer
    x = 687.64

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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.