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Finding the Fourth Proportional to 982.56, 1,355.66 and 650.88

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Solution

The fourth proportional to 982.56, 1,355.66 and 650.88 is: 898.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.56 : 1,355.66 = 650.88 : x
  2. Step 2: Convert to fraction form
    982.56/1,355.66 = 650.88/x
  3. Step 3: Cross multiply
    982.56x = 1,355.66 × 650.88
  4. Step 4: Simplify right side
    982.56x = 882,371.98
  5. Step 5: Solve for x
    x = 882,371.98/982.56
  6. Step 6: Final answer
    x = 898.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.