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Finding the Fourth Proportional to 403.44, 556.38 and 270.80

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Solution

The fourth proportional to 403.44, 556.38 and 270.80 is: 373.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.44 : 556.38 = 270.80 : x
  2. Step 2: Convert to fraction form
    403.44/556.38 = 270.80/x
  3. Step 3: Cross multiply
    403.44x = 556.38 × 270.80
  4. Step 4: Simplify right side
    403.44x = 150,664.92
  5. Step 5: Solve for x
    x = 150,664.92/403.44
  6. Step 6: Final answer
    x = 373.45

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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.