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Finding the Fourth Proportional to 982.46, 1,355.19 and 749.18

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Solution

The fourth proportional to 982.46, 1,355.19 and 749.18 is: 1,033.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.46 : 1,355.19 = 749.18 : x
  2. Step 2: Convert to fraction form
    982.46/1,355.19 = 749.18/x
  3. Step 3: Cross multiply
    982.46x = 1,355.19 × 749.18
  4. Step 4: Simplify right side
    982.46x = 1,015,281.24
  5. Step 5: Solve for x
    x = 1,015,281.24/982.46
  6. Step 6: Final answer
    x = 1,033.41

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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.