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Finding the Fourth Proportional to 980.52, 1,352.90 and 582.19

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Solution

The fourth proportional to 980.52, 1,352.90 and 582.19 is: 803.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.52 : 1,352.90 = 582.19 : x
  2. Step 2: Convert to fraction form
    980.52/1,352.90 = 582.19/x
  3. Step 3: Cross multiply
    980.52x = 1,352.90 × 582.19
  4. Step 4: Simplify right side
    980.52x = 787,642.92
  5. Step 5: Solve for x
    x = 787,642.92/980.52
  6. Step 6: Final answer
    x = 803.29

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Double scale
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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.