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Finding the Fourth Proportional to 654.47, 982.79 and 626.39

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Solution

The fourth proportional to 654.47, 982.79 and 626.39 is: 940.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.47 : 982.79 = 626.39 : x
  2. Step 2: Convert to fraction form
    654.47/982.79 = 626.39/x
  3. Step 3: Cross multiply
    654.47x = 982.79 × 626.39
  4. Step 4: Simplify right side
    654.47x = 615,601.78
  5. Step 5: Solve for x
    x = 615,601.78/654.47
  6. Step 6: Final answer
    x = 940.62

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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.