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Finding the Fourth Proportional to 386.37, 529.34 and 371.79

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Solution

The fourth proportional to 386.37, 529.34 and 371.79 is: 509.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.37 : 529.34 = 371.79 : x
  2. Step 2: Convert to fraction form
    386.37/529.34 = 371.79/x
  3. Step 3: Cross multiply
    386.37x = 529.34 × 371.79
  4. Step 4: Simplify right side
    386.37x = 196,801.46
  5. Step 5: Solve for x
    x = 196,801.46/386.37
  6. Step 6: Final answer
    x = 509.36

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.