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Finding the Fourth Proportional to 654.98, 980.18 and 395.11

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Solution

The fourth proportional to 654.98, 980.18 and 395.11 is: 591.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.98 : 980.18 = 395.11 : x
  2. Step 2: Convert to fraction form
    654.98/980.18 = 395.11/x
  3. Step 3: Cross multiply
    654.98x = 980.18 × 395.11
  4. Step 4: Simplify right side
    654.98x = 387,272.04
  5. Step 5: Solve for x
    x = 387,272.04/654.98
  6. Step 6: Final answer
    x = 591.27

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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.