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Finding the Fourth Proportional to 219.36, 304.02 and 215.26

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Solution

The fourth proportional to 219.36, 304.02 and 215.26 is: 298.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.36 : 304.02 = 215.26 : x
  2. Step 2: Convert to fraction form
    219.36/304.02 = 215.26/x
  3. Step 3: Cross multiply
    219.36x = 304.02 × 215.26
  4. Step 4: Simplify right side
    219.36x = 65,443.35
  5. Step 5: Solve for x
    x = 65,443.35/219.36
  6. Step 6: Final answer
    x = 298.34

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.