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Finding the Fourth Proportional to 982.45, 1,470.48 and 722.39

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Solution

The fourth proportional to 982.45, 1,470.48 and 722.39 is: 1,081.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.45 : 1,470.48 = 722.39 : x
  2. Step 2: Convert to fraction form
    982.45/1,470.48 = 722.39/x
  3. Step 3: Cross multiply
    982.45x = 1,470.48 × 722.39
  4. Step 4: Simplify right side
    982.45x = 1,062,254.05
  5. Step 5: Solve for x
    x = 1,062,254.05/982.45
  6. Step 6: Final answer
    x = 1,081.23

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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.