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Finding the Fourth Proportional to 419.73, 578.39 and 346.56

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Solution

The fourth proportional to 419.73, 578.39 and 346.56 is: 477.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.73 : 578.39 = 346.56 : x
  2. Step 2: Convert to fraction form
    419.73/578.39 = 346.56/x
  3. Step 3: Cross multiply
    419.73x = 578.39 × 346.56
  4. Step 4: Simplify right side
    419.73x = 200,445.11
  5. Step 5: Solve for x
    x = 200,445.11/419.73
  6. Step 6: Final answer
    x = 477.56

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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.