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Finding the Fourth Proportional to 729.55, 1,094.65 and 382.80

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Solution

The fourth proportional to 729.55, 1,094.65 and 382.80 is: 574.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.55 : 1,094.65 = 382.80 : x
  2. Step 2: Convert to fraction form
    729.55/1,094.65 = 382.80/x
  3. Step 3: Cross multiply
    729.55x = 1,094.65 × 382.80
  4. Step 4: Simplify right side
    729.55x = 419,032.02
  5. Step 5: Solve for x
    x = 419,032.02/729.55
  6. Step 6: Final answer
    x = 574.37

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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.