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Finding the Fourth Proportional to 357.21, 492.62 and 274.32

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Solution

The fourth proportional to 357.21, 492.62 and 274.32 is: 378.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.21 : 492.62 = 274.32 : x
  2. Step 2: Convert to fraction form
    357.21/492.62 = 274.32/x
  3. Step 3: Cross multiply
    357.21x = 492.62 × 274.32
  4. Step 4: Simplify right side
    357.21x = 135,134.15
  5. Step 5: Solve for x
    x = 135,134.15/357.21
  6. Step 6: Final answer
    x = 378.30

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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.