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Finding the Fourth Proportional to 852.82, 1,279.22 and 578.23

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Solution

The fourth proportional to 852.82, 1,279.22 and 578.23 is: 867.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.82 : 1,279.22 = 578.23 : x
  2. Step 2: Convert to fraction form
    852.82/1,279.22 = 578.23/x
  3. Step 3: Cross multiply
    852.82x = 1,279.22 × 578.23
  4. Step 4: Simplify right side
    852.82x = 739,683.38
  5. Step 5: Solve for x
    x = 739,683.38/852.82
  6. Step 6: Final answer
    x = 867.34

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.