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Finding the Fourth Proportional to 378.72, 525.05 and 365.37

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Solution

The fourth proportional to 378.72, 525.05 and 365.37 is: 506.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.72 : 525.05 = 365.37 : x
  2. Step 2: Convert to fraction form
    378.72/525.05 = 365.37/x
  3. Step 3: Cross multiply
    378.72x = 525.05 × 365.37
  4. Step 4: Simplify right side
    378.72x = 191,835.69
  5. Step 5: Solve for x
    x = 191,835.69/378.72
  6. Step 6: Final answer
    x = 506.54

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.