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Finding the Fourth Proportional to 371.18, 553.40 and 361.56

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Solution

The fourth proportional to 371.18, 553.40 and 361.56 is: 539.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.18 : 553.40 = 361.56 : x
  2. Step 2: Convert to fraction form
    371.18/553.40 = 361.56/x
  3. Step 3: Cross multiply
    371.18x = 553.40 × 361.56
  4. Step 4: Simplify right side
    371.18x = 200,085.50
  5. Step 5: Solve for x
    x = 200,085.50/371.18
  6. Step 6: Final answer
    x = 539.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.