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Finding the Fourth Proportional to 798.10, 1,100.62 and 611.60

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Solution

The fourth proportional to 798.10, 1,100.62 and 611.60 is: 843.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.10 : 1,100.62 = 611.60 : x
  2. Step 2: Convert to fraction form
    798.10/1,100.62 = 611.60/x
  3. Step 3: Cross multiply
    798.10x = 1,100.62 × 611.60
  4. Step 4: Simplify right side
    798.10x = 673,139.19
  5. Step 5: Solve for x
    x = 673,139.19/798.10
  6. Step 6: Final answer
    x = 843.43

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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.