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Finding the Fourth Proportional to 980.22, 1,351.19 and 606.50

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Solution

The fourth proportional to 980.22, 1,351.19 and 606.50 is: 836.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.22 : 1,351.19 = 606.50 : x
  2. Step 2: Convert to fraction form
    980.22/1,351.19 = 606.50/x
  3. Step 3: Cross multiply
    980.22x = 1,351.19 × 606.50
  4. Step 4: Simplify right side
    980.22x = 819,496.74
  5. Step 5: Solve for x
    x = 819,496.74/980.22
  6. Step 6: Final answer
    x = 836.03

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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.