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Finding the Fourth Proportional to 1,954.79, 2,930.81 and 980.22

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Solution

The fourth proportional to 1,954.79, 2,930.81 and 980.22 is: 1,469.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.79 : 2,930.81 = 980.22 : x
  2. Step 2: Convert to fraction form
    1,954.79/2,930.81 = 980.22/x
  3. Step 3: Cross multiply
    1,954.79x = 2,930.81 × 980.22
  4. Step 4: Simplify right side
    1,954.79x = 2,872,833.68
  5. Step 5: Solve for x
    x = 2,872,833.68/1,954.79
  6. Step 6: Final answer
    x = 1,469.64

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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.