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Finding the Fourth Proportional to 276.16, 412.38 and 273.12

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Solution

The fourth proportional to 276.16, 412.38 and 273.12 is: 407.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.16 : 412.38 = 273.12 : x
  2. Step 2: Convert to fraction form
    276.16/412.38 = 273.12/x
  3. Step 3: Cross multiply
    276.16x = 412.38 × 273.12
  4. Step 4: Simplify right side
    276.16x = 112,629.23
  5. Step 5: Solve for x
    x = 112,629.23/276.16
  6. Step 6: Final answer
    x = 407.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.