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Finding the Fourth Proportional to 980.19, 1,352.78 and 566.19

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Solution

The fourth proportional to 980.19, 1,352.78 and 566.19 is: 781.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.19 : 1,352.78 = 566.19 : x
  2. Step 2: Convert to fraction form
    980.19/1,352.78 = 566.19/x
  3. Step 3: Cross multiply
    980.19x = 1,352.78 × 566.19
  4. Step 4: Simplify right side
    980.19x = 765,930.51
  5. Step 5: Solve for x
    x = 765,930.51/980.19
  6. Step 6: Final answer
    x = 781.41

Related Problems

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Half scale
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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.