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Finding the Fourth Proportional to 361.36, 498.40 and 256.34

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Solution

The fourth proportional to 361.36, 498.40 and 256.34 is: 353.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.36 : 498.40 = 256.34 : x
  2. Step 2: Convert to fraction form
    361.36/498.40 = 256.34/x
  3. Step 3: Cross multiply
    361.36x = 498.40 × 256.34
  4. Step 4: Simplify right side
    361.36x = 127,760.50
  5. Step 5: Solve for x
    x = 127,760.50/361.36
  6. Step 6: Final answer
    x = 353.55

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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.