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Finding the Fourth Proportional to 731.08, 1,097.20 and 320.50

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Solution

The fourth proportional to 731.08, 1,097.20 and 320.50 is: 481.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.08 : 1,097.20 = 320.50 : x
  2. Step 2: Convert to fraction form
    731.08/1,097.20 = 320.50/x
  3. Step 3: Cross multiply
    731.08x = 1,097.20 × 320.50
  4. Step 4: Simplify right side
    731.08x = 351,651.00
  5. Step 5: Solve for x
    x = 351,651.00/731.08
  6. Step 6: Final answer
    x = 481.01

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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.