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Finding the Fourth Proportional to 370.78, 557.08 and 361.67

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Solution

The fourth proportional to 370.78, 557.08 and 361.67 is: 543.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.78 : 557.08 = 361.67 : x
  2. Step 2: Convert to fraction form
    370.78/557.08 = 361.67/x
  3. Step 3: Cross multiply
    370.78x = 557.08 × 361.67
  4. Step 4: Simplify right side
    370.78x = 201,475.43
  5. Step 5: Solve for x
    x = 201,475.43/370.78
  6. Step 6: Final answer
    x = 543.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.