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Finding the Fourth Proportional to 540.05, 744.74 and 392.73

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Solution

The fourth proportional to 540.05, 744.74 and 392.73 is: 541.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.05 : 744.74 = 392.73 : x
  2. Step 2: Convert to fraction form
    540.05/744.74 = 392.73/x
  3. Step 3: Cross multiply
    540.05x = 744.74 × 392.73
  4. Step 4: Simplify right side
    540.05x = 292,479.78
  5. Step 5: Solve for x
    x = 292,479.78/540.05
  6. Step 6: Final answer
    x = 541.58

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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.