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Finding the Fourth Proportional to 884.80, 1,327.20 and 803.80

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Solution

The fourth proportional to 884.80, 1,327.20 and 803.80 is: 1,205.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.80 : 1,327.20 = 803.80 : x
  2. Step 2: Convert to fraction form
    884.80/1,327.20 = 803.80/x
  3. Step 3: Cross multiply
    884.80x = 1,327.20 × 803.80
  4. Step 4: Simplify right side
    884.80x = 1,066,803.36
  5. Step 5: Solve for x
    x = 1,066,803.36/884.80
  6. Step 6: Final answer
    x = 1,205.70

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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.