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Finding the Fourth Proportional to 540.09, 745.21 and 343.64

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Solution

The fourth proportional to 540.09, 745.21 and 343.64 is: 474.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.09 : 745.21 = 343.64 : x
  2. Step 2: Convert to fraction form
    540.09/745.21 = 343.64/x
  3. Step 3: Cross multiply
    540.09x = 745.21 × 343.64
  4. Step 4: Simplify right side
    540.09x = 256,086.74
  5. Step 5: Solve for x
    x = 256,086.74/540.09
  6. Step 6: Final answer
    x = 474.15

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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.