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Finding the Fourth Proportional to 577.28, 867.20 and 320.64

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Solution

The fourth proportional to 577.28, 867.20 and 320.64 is: 481.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.28 : 867.20 = 320.64 : x
  2. Step 2: Convert to fraction form
    577.28/867.20 = 320.64/x
  3. Step 3: Cross multiply
    577.28x = 867.20 × 320.64
  4. Step 4: Simplify right side
    577.28x = 278,059.01
  5. Step 5: Solve for x
    x = 278,059.01/577.28
  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.