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Finding the Fourth Proportional to 873.66, 1,311 and 326.23

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Solution

The fourth proportional to 873.66, 1,311 and 326.23 is: 489.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.66 : 1,311 = 326.23 : x
  2. Step 2: Convert to fraction form
    873.66/1,311 = 326.23/x
  3. Step 3: Cross multiply
    873.66x = 1,311 × 326.23
  4. Step 4: Simplify right side
    873.66x = 427,680.98
  5. Step 5: Solve for x
    x = 427,680.98/873.66
  6. Step 6: Final answer
    x = 489.53

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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.