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Finding the Fourth Proportional to 219.86, 303.09 and 154.16

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Solution

The fourth proportional to 219.86, 303.09 and 154.16 is: 212.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.86 : 303.09 = 154.16 : x
  2. Step 2: Convert to fraction form
    219.86/303.09 = 154.16/x
  3. Step 3: Cross multiply
    219.86x = 303.09 × 154.16
  4. Step 4: Simplify right side
    219.86x = 46,724.35
  5. Step 5: Solve for x
    x = 46,724.35/219.86
  6. Step 6: Final answer
    x = 212.52

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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.