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Finding the Fourth Proportional to 290.01, 399.56 and 228.03

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Solution

The fourth proportional to 290.01, 399.56 and 228.03 is: 314.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.01 : 399.56 = 228.03 : x
  2. Step 2: Convert to fraction form
    290.01/399.56 = 228.03/x
  3. Step 3: Cross multiply
    290.01x = 399.56 × 228.03
  4. Step 4: Simplify right side
    290.01x = 91,110.53
  5. Step 5: Solve for x
    x = 91,110.53/290.01
  6. Step 6: Final answer
    x = 314.16

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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.