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Finding the Fourth Proportional to 984.54, 1,479.55 and 674.26

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Solution

The fourth proportional to 984.54, 1,479.55 and 674.26 is: 1,013.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.54 : 1,479.55 = 674.26 : x
  2. Step 2: Convert to fraction form
    984.54/1,479.55 = 674.26/x
  3. Step 3: Cross multiply
    984.54x = 1,479.55 × 674.26
  4. Step 4: Simplify right side
    984.54x = 997,601.38
  5. Step 5: Solve for x
    x = 997,601.38/984.54
  6. Step 6: Final answer
    x = 1,013.27

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Double scale
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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.