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Finding the Fourth Proportional to 980.08, 1,352.82 and 607.12

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Solution

The fourth proportional to 980.08, 1,352.82 and 607.12 is: 838.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.08 : 1,352.82 = 607.12 : x
  2. Step 2: Convert to fraction form
    980.08/1,352.82 = 607.12/x
  3. Step 3: Cross multiply
    980.08x = 1,352.82 × 607.12
  4. Step 4: Simplify right side
    980.08x = 821,324.08
  5. Step 5: Solve for x
    x = 821,324.08/980.08
  6. Step 6: Final answer
    x = 838.02

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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.