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Finding the Fourth Proportional to 578.42, 867.72 and 193.64

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Solution

The fourth proportional to 578.42, 867.72 and 193.64 is: 290.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.42 : 867.72 = 193.64 : x
  2. Step 2: Convert to fraction form
    578.42/867.72 = 193.64/x
  3. Step 3: Cross multiply
    578.42x = 867.72 × 193.64
  4. Step 4: Simplify right side
    578.42x = 168,025.30
  5. Step 5: Solve for x
    x = 168,025.30/578.42
  6. Step 6: Final answer
    x = 290.49

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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.