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Finding the Fourth Proportional to 418.44, 579.93 and 412.20

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Solution

The fourth proportional to 418.44, 579.93 and 412.20 is: 571.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.44 : 579.93 = 412.20 : x
  2. Step 2: Convert to fraction form
    418.44/579.93 = 412.20/x
  3. Step 3: Cross multiply
    418.44x = 579.93 × 412.20
  4. Step 4: Simplify right side
    418.44x = 239,047.15
  5. Step 5: Solve for x
    x = 239,047.15/418.44
  6. Step 6: Final answer
    x = 571.28

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.