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Finding the Fourth Proportional to 984.65, 1,477.12 and 326.54

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Solution

The fourth proportional to 984.65, 1,477.12 and 326.54 is: 489.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.65 : 1,477.12 = 326.54 : x
  2. Step 2: Convert to fraction form
    984.65/1,477.12 = 326.54/x
  3. Step 3: Cross multiply
    984.65x = 1,477.12 × 326.54
  4. Step 4: Simplify right side
    984.65x = 482,343.27
  5. Step 5: Solve for x
    x = 482,343.27/984.65
  6. Step 6: Final answer
    x = 489.87

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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.