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Finding the Fourth Proportional to 580.28, 800.80 and 318.32

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Solution

The fourth proportional to 580.28, 800.80 and 318.32 is: 439.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.28 : 800.80 = 318.32 : x
  2. Step 2: Convert to fraction form
    580.28/800.80 = 318.32/x
  3. Step 3: Cross multiply
    580.28x = 800.80 × 318.32
  4. Step 4: Simplify right side
    580.28x = 254,910.66
  5. Step 5: Solve for x
    x = 254,910.66/580.28
  6. Step 6: Final answer
    x = 439.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.