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Finding the Fourth Proportional to 980.10, 1,353.17 and 607.48

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Solution

The fourth proportional to 980.10, 1,353.17 and 607.48 is: 838.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.10 : 1,353.17 = 607.48 : x
  2. Step 2: Convert to fraction form
    980.10/1,353.17 = 607.48/x
  3. Step 3: Cross multiply
    980.10x = 1,353.17 × 607.48
  4. Step 4: Simplify right side
    980.10x = 822,022.99
  5. Step 5: Solve for x
    x = 822,022.99/980.10
  6. Step 6: Final answer
    x = 838.71

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1.5x scale

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.