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Finding the Fourth Proportional to 578.20, 867.16 and 213.03

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Solution

The fourth proportional to 578.20, 867.16 and 213.03 is: 319.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.20 : 867.16 = 213.03 : x
  2. Step 2: Convert to fraction form
    578.20/867.16 = 213.03/x
  3. Step 3: Cross multiply
    578.20x = 867.16 × 213.03
  4. Step 4: Simplify right side
    578.20x = 184,731.09
  5. Step 5: Solve for x
    x = 184,731.09/578.20
  6. Step 6: Final answer
    x = 319.49

Related Problems

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Half scale
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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.