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Finding the Fourth Proportional to 487.37, 728.09 and 371.49

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Solution

The fourth proportional to 487.37, 728.09 and 371.49 is: 554.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.37 : 728.09 = 371.49 : x
  2. Step 2: Convert to fraction form
    487.37/728.09 = 371.49/x
  3. Step 3: Cross multiply
    487.37x = 728.09 × 371.49
  4. Step 4: Simplify right side
    487.37x = 270,474.96
  5. Step 5: Solve for x
    x = 270,474.96/487.37
  6. Step 6: Final answer
    x = 554.97

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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.