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Finding the Fourth Proportional to 492.65, 679.86 and 271.60

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Solution

The fourth proportional to 492.65, 679.86 and 271.60 is: 374.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.65 : 679.86 = 271.60 : x
  2. Step 2: Convert to fraction form
    492.65/679.86 = 271.60/x
  3. Step 3: Cross multiply
    492.65x = 679.86 × 271.60
  4. Step 4: Simplify right side
    492.65x = 184,651.84
  5. Step 5: Solve for x
    x = 184,651.84/492.65
  6. Step 6: Final answer
    x = 374.81

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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.