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Finding the Fourth Proportional to 419.87, 627.11 and 333.30

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Solution

The fourth proportional to 419.87, 627.11 and 333.30 is: 497.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.87 : 627.11 = 333.30 : x
  2. Step 2: Convert to fraction form
    419.87/627.11 = 333.30/x
  3. Step 3: Cross multiply
    419.87x = 627.11 × 333.30
  4. Step 4: Simplify right side
    419.87x = 209,014.10
  5. Step 5: Solve for x
    x = 209,014.10/419.87
  6. Step 6: Final answer
    x = 497.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.