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Finding the Fourth Proportional to 711.23, 1,067.16 and 321.02

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Solution

The fourth proportional to 711.23, 1,067.16 and 321.02 is: 481.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.23 : 1,067.16 = 321.02 : x
  2. Step 2: Convert to fraction form
    711.23/1,067.16 = 321.02/x
  3. Step 3: Cross multiply
    711.23x = 1,067.16 × 321.02
  4. Step 4: Simplify right side
    711.23x = 342,574.37
  5. Step 5: Solve for x
    x = 342,574.37/711.23
  6. Step 6: Final answer
    x = 481.67

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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.