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Finding the Fourth Proportional to 344.50, 474.58 and 289.55

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Solution

The fourth proportional to 344.50, 474.58 and 289.55 is: 398.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.50 : 474.58 = 289.55 : x
  2. Step 2: Convert to fraction form
    344.50/474.58 = 289.55/x
  3. Step 3: Cross multiply
    344.50x = 474.58 × 289.55
  4. Step 4: Simplify right side
    344.50x = 137,414.64
  5. Step 5: Solve for x
    x = 137,414.64/344.50
  6. Step 6: Final answer
    x = 398.88

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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.