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Finding the Fourth Proportional to 626.96, 940.65 and 280.53

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Solution

The fourth proportional to 626.96, 940.65 and 280.53 is: 420.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.96 : 940.65 = 280.53 : x
  2. Step 2: Convert to fraction form
    626.96/940.65 = 280.53/x
  3. Step 3: Cross multiply
    626.96x = 940.65 × 280.53
  4. Step 4: Simplify right side
    626.96x = 263,879.14
  5. Step 5: Solve for x
    x = 263,879.14/626.96
  6. Step 6: Final answer
    x = 420.89

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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.