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Finding the Fourth Proportional to 370.80, 511.20 and 361.44

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Solution

The fourth proportional to 370.80, 511.20 and 361.44 is: 498.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.80 : 511.20 = 361.44 : x
  2. Step 2: Convert to fraction form
    370.80/511.20 = 361.44/x
  3. Step 3: Cross multiply
    370.80x = 511.20 × 361.44
  4. Step 4: Simplify right side
    370.80x = 184,768.13
  5. Step 5: Solve for x
    x = 184,768.13/370.80
  6. Step 6: Final answer
    x = 498.30

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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.