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Finding the Fourth Proportional to 912.54, 1,368.34 and 327.32

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Solution

The fourth proportional to 912.54, 1,368.34 and 327.32 is: 490.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.54 : 1,368.34 = 327.32 : x
  2. Step 2: Convert to fraction form
    912.54/1,368.34 = 327.32/x
  3. Step 3: Cross multiply
    912.54x = 1,368.34 × 327.32
  4. Step 4: Simplify right side
    912.54x = 447,885.05
  5. Step 5: Solve for x
    x = 447,885.05/912.54
  6. Step 6: Final answer
    x = 490.81

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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.