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Finding the Fourth Proportional to 803.50, 1,205.25 and 195.50

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Solution

The fourth proportional to 803.50, 1,205.25 and 195.50 is: 293.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.50 : 1,205.25 = 195.50 : x
  2. Step 2: Convert to fraction form
    803.50/1,205.25 = 195.50/x
  3. Step 3: Cross multiply
    803.50x = 1,205.25 × 195.50
  4. Step 4: Simplify right side
    803.50x = 235,626.38
  5. Step 5: Solve for x
    x = 235,626.38/803.50
  6. Step 6: Final answer
    x = 293.25

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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.