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Finding the Fourth Proportional to 800.80, 1,090.24 and 793.60

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Solution

The fourth proportional to 800.80, 1,090.24 and 793.60 is: 1,080.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.80 : 1,090.24 = 793.60 : x
  2. Step 2: Convert to fraction form
    800.80/1,090.24 = 793.60/x
  3. Step 3: Cross multiply
    800.80x = 1,090.24 × 793.60
  4. Step 4: Simplify right side
    800.80x = 865,214.46
  5. Step 5: Solve for x
    x = 865,214.46/800.80
  6. Step 6: Final answer
    x = 1,080.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.