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Finding the Fourth Proportional to 1,628.72, 2,443.19 and 654.70

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Solution

The fourth proportional to 1,628.72, 2,443.19 and 654.70 is: 982.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.72 : 2,443.19 = 654.70 : x
  2. Step 2: Convert to fraction form
    1,628.72/2,443.19 = 654.70/x
  3. Step 3: Cross multiply
    1,628.72x = 2,443.19 × 654.70
  4. Step 4: Simplify right side
    1,628.72x = 1,599,556.49
  5. Step 5: Solve for x
    x = 1,599,556.49/1,628.72
  6. Step 6: Final answer
    x = 982.09

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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.