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Finding the Fourth Proportional to 239, 357.90 and 181.28

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Solution

The fourth proportional to 239, 357.90 and 181.28 is: 271.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    239 : 357.90 = 181.28 : x
  2. Step 2: Convert to fraction form
    239/357.90 = 181.28/x
  3. Step 3: Cross multiply
    239x = 357.90 × 181.28
  4. Step 4: Simplify right side
    239x = 64,880.11
  5. Step 5: Solve for x
    x = 64,880.11/239
  6. Step 6: Final answer
    x = 271.46

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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.