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Finding the Fourth Proportional to 1,979.34, 2,968.67 and 662.96

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Solution

The fourth proportional to 1,979.34, 2,968.67 and 662.96 is: 994.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.34 : 2,968.67 = 662.96 : x
  2. Step 2: Convert to fraction form
    1,979.34/2,968.67 = 662.96/x
  3. Step 3: Cross multiply
    1,979.34x = 2,968.67 × 662.96
  4. Step 4: Simplify right side
    1,979.34x = 1,968,113.57
  5. Step 5: Solve for x
    x = 1,968,113.57/1,979.34
  6. Step 6: Final answer
    x = 994.33

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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.