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Finding the Fourth Proportional to 419.62, 579.00 and 251.57

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Solution

The fourth proportional to 419.62, 579.00 and 251.57 is: 347.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.62 : 579.00 = 251.57 : x
  2. Step 2: Convert to fraction form
    419.62/579.00 = 251.57/x
  3. Step 3: Cross multiply
    419.62x = 579.00 × 251.57
  4. Step 4: Simplify right side
    419.62x = 145,659.53
  5. Step 5: Solve for x
    x = 145,659.53/419.62
  6. Step 6: Final answer
    x = 347.12

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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.