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Finding the Fourth Proportional to 419.05, 578.35 and 349.01

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Solution

The fourth proportional to 419.05, 578.35 and 349.01 is: 481.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.05 : 578.35 = 349.01 : x
  2. Step 2: Convert to fraction form
    419.05/578.35 = 349.01/x
  3. Step 3: Cross multiply
    419.05x = 578.35 × 349.01
  4. Step 4: Simplify right side
    419.05x = 201,849.93
  5. Step 5: Solve for x
    x = 201,849.93/419.05
  6. Step 6: Final answer
    x = 481.68

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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.