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Finding the Fourth Proportional to 654.47, 980.41 and 394.54

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Solution

The fourth proportional to 654.47, 980.41 and 394.54 is: 591.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.47 : 980.41 = 394.54 : x
  2. Step 2: Convert to fraction form
    654.47/980.41 = 394.54/x
  3. Step 3: Cross multiply
    654.47x = 980.41 × 394.54
  4. Step 4: Simplify right side
    654.47x = 386,812.68
  5. Step 5: Solve for x
    x = 386,812.68/654.47
  6. Step 6: Final answer
    x = 591.03

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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.