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Finding the Fourth Proportional to 386.36, 581.01 and 308.45

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Solution

The fourth proportional to 386.36, 581.01 and 308.45 is: 463.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.36 : 581.01 = 308.45 : x
  2. Step 2: Convert to fraction form
    386.36/581.01 = 308.45/x
  3. Step 3: Cross multiply
    386.36x = 581.01 × 308.45
  4. Step 4: Simplify right side
    386.36x = 179,212.53
  5. Step 5: Solve for x
    x = 179,212.53/386.36
  6. Step 6: Final answer
    x = 463.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.