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Finding the Fourth Proportional to 815.00, 1,222.40 and 267.05

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Solution

The fourth proportional to 815.00, 1,222.40 and 267.05 is: 400.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.00 : 1,222.40 = 267.05 : x
  2. Step 2: Convert to fraction form
    815.00/1,222.40 = 267.05/x
  3. Step 3: Cross multiply
    815.00x = 1,222.40 × 267.05
  4. Step 4: Simplify right side
    815.00x = 326,439.14
  5. Step 5: Solve for x
    x = 326,439.14/815.00
  6. Step 6: Final answer
    x = 400.54

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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.