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Finding the Fourth Proportional to 344.35, 515.46 and 257.18

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Solution

The fourth proportional to 344.35, 515.46 and 257.18 is: 384.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.35 : 515.46 = 257.18 : x
  2. Step 2: Convert to fraction form
    344.35/515.46 = 257.18/x
  3. Step 3: Cross multiply
    344.35x = 515.46 × 257.18
  4. Step 4: Simplify right side
    344.35x = 132,564.39
  5. Step 5: Solve for x
    x = 132,564.39/344.35
  6. Step 6: Final answer
    x = 384.97

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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.