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Finding the Fourth Proportional to 403.48, 556.86 and 270.69

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Solution

The fourth proportional to 403.48, 556.86 and 270.69 is: 373.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.48 : 556.86 = 270.69 : x
  2. Step 2: Convert to fraction form
    403.48/556.86 = 270.69/x
  3. Step 3: Cross multiply
    403.48x = 556.86 × 270.69
  4. Step 4: Simplify right side
    403.48x = 150,736.43
  5. Step 5: Solve for x
    x = 150,736.43/403.48
  6. Step 6: Final answer
    x = 373.59

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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.