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Finding the Fourth Proportional to 220.44, 330.78 and 152.16

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Solution

The fourth proportional to 220.44, 330.78 and 152.16 is: 228.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.44 : 330.78 = 152.16 : x
  2. Step 2: Convert to fraction form
    220.44/330.78 = 152.16/x
  3. Step 3: Cross multiply
    220.44x = 330.78 × 152.16
  4. Step 4: Simplify right side
    220.44x = 50,331.48
  5. Step 5: Solve for x
    x = 50,331.48/220.44
  6. Step 6: Final answer
    x = 228.32

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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.