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Finding the Fourth Proportional to 419.44, 629.44 and 339.24

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Solution

The fourth proportional to 419.44, 629.44 and 339.24 is: 509.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.44 : 629.44 = 339.24 : x
  2. Step 2: Convert to fraction form
    419.44/629.44 = 339.24/x
  3. Step 3: Cross multiply
    419.44x = 629.44 × 339.24
  4. Step 4: Simplify right side
    419.44x = 213,531.23
  5. Step 5: Solve for x
    x = 213,531.23/419.44
  6. Step 6: Final answer
    x = 509.09

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.