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Finding the Fourth Proportional to 393.09, 587.38 and 300.03

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Solution

The fourth proportional to 393.09, 587.38 and 300.03 is: 448.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.09 : 587.38 = 300.03 : x
  2. Step 2: Convert to fraction form
    393.09/587.38 = 300.03/x
  3. Step 3: Cross multiply
    393.09x = 587.38 × 300.03
  4. Step 4: Simplify right side
    393.09x = 176,230.87
  5. Step 5: Solve for x
    x = 176,230.87/393.09
  6. Step 6: Final answer
    x = 448.32

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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.