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Finding the Fourth Proportional to 580.08, 800.49 and 318.09

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Solution

The fourth proportional to 580.08, 800.49 and 318.09 is: 438.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.08 : 800.49 = 318.09 : x
  2. Step 2: Convert to fraction form
    580.08/800.49 = 318.09/x
  3. Step 3: Cross multiply
    580.08x = 800.49 × 318.09
  4. Step 4: Simplify right side
    580.08x = 254,627.86
  5. Step 5: Solve for x
    x = 254,627.86/580.08
  6. Step 6: Final answer
    x = 438.95

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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.