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Finding the Fourth Proportional to 357.16, 492.94 and 274.54

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Solution

The fourth proportional to 357.16, 492.94 and 274.54 is: 378.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.16 : 492.94 = 274.54 : x
  2. Step 2: Convert to fraction form
    357.16/492.94 = 274.54/x
  3. Step 3: Cross multiply
    357.16x = 492.94 × 274.54
  4. Step 4: Simplify right side
    357.16x = 135,331.75
  5. Step 5: Solve for x
    x = 135,331.75/357.16
  6. Step 6: Final answer
    x = 378.91

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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.