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Finding the Fourth Proportional to 397.40, 547.94 and 275.82

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Solution

The fourth proportional to 397.40, 547.94 and 275.82 is: 380.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.40 : 547.94 = 275.82 : x
  2. Step 2: Convert to fraction form
    397.40/547.94 = 275.82/x
  3. Step 3: Cross multiply
    397.40x = 547.94 × 275.82
  4. Step 4: Simplify right side
    397.40x = 151,131.43
  5. Step 5: Solve for x
    x = 151,131.43/397.40
  6. Step 6: Final answer
    x = 380.31

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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.