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Finding the Fourth Proportional to 984.28, 1,476.59 and 326.19

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Solution

The fourth proportional to 984.28, 1,476.59 and 326.19 is: 489.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.28 : 1,476.59 = 326.19 : x
  2. Step 2: Convert to fraction form
    984.28/1,476.59 = 326.19/x
  3. Step 3: Cross multiply
    984.28x = 1,476.59 × 326.19
  4. Step 4: Simplify right side
    984.28x = 481,649.71
  5. Step 5: Solve for x
    x = 481,649.71/984.28
  6. Step 6: Final answer
    x = 489.34

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1.5x scale

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.