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Finding the Fourth Proportional to 257.18, 383.04 and 254.34

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Solution

The fourth proportional to 257.18, 383.04 and 254.34 is: 378.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.18 : 383.04 = 254.34 : x
  2. Step 2: Convert to fraction form
    257.18/383.04 = 254.34/x
  3. Step 3: Cross multiply
    257.18x = 383.04 × 254.34
  4. Step 4: Simplify right side
    257.18x = 97,422.39
  5. Step 5: Solve for x
    x = 97,422.39/257.18
  6. Step 6: Final answer
    x = 378.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.