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Finding the Fourth Proportional to 940.94, 1,297.94 and 547.90

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Solution

The fourth proportional to 940.94, 1,297.94 and 547.90 is: 755.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.94 : 1,297.94 = 547.90 : x
  2. Step 2: Convert to fraction form
    940.94/1,297.94 = 547.90/x
  3. Step 3: Cross multiply
    940.94x = 1,297.94 × 547.90
  4. Step 4: Simplify right side
    940.94x = 711,141.33
  5. Step 5: Solve for x
    x = 711,141.33/940.94
  6. Step 6: Final answer
    x = 755.78

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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.