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Finding the Fourth Proportional to 3,329.65, 4,992.74 and 989.33

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Solution

The fourth proportional to 3,329.65, 4,992.74 and 989.33 is: 1,483.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,329.65 : 4,992.74 = 989.33 : x
  2. Step 2: Convert to fraction form
    3,329.65/4,992.74 = 989.33/x
  3. Step 3: Cross multiply
    3,329.65x = 4,992.74 × 989.33
  4. Step 4: Simplify right side
    3,329.65x = 4,939,483.39
  5. Step 5: Solve for x
    x = 4,939,483.39/3,329.65
  6. Step 6: Final answer
    x = 1,483.48

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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.