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Finding the Fourth Proportional to 289.58, 399.06 and 227.25

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Solution

The fourth proportional to 289.58, 399.06 and 227.25 is: 313.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.58 : 399.06 = 227.25 : x
  2. Step 2: Convert to fraction form
    289.58/399.06 = 227.25/x
  3. Step 3: Cross multiply
    289.58x = 399.06 × 227.25
  4. Step 4: Simplify right side
    289.58x = 90,686.39
  5. Step 5: Solve for x
    x = 90,686.39/289.58
  6. Step 6: Final answer
    x = 313.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.