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Finding the Fourth Proportional to 344.32, 474.78 and 219.78

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Solution

The fourth proportional to 344.32, 474.78 and 219.78 is: 303.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.32 : 474.78 = 219.78 : x
  2. Step 2: Convert to fraction form
    344.32/474.78 = 219.78/x
  3. Step 3: Cross multiply
    344.32x = 474.78 × 219.78
  4. Step 4: Simplify right side
    344.32x = 104,347.15
  5. Step 5: Solve for x
    x = 104,347.15/344.32
  6. Step 6: Final answer
    x = 303.05

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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.