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Finding the Fourth Proportional to 2,954.38, 4,430.50 and 979.64

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Solution

The fourth proportional to 2,954.38, 4,430.50 and 979.64 is: 1,469.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,954.38 : 4,430.50 = 979.64 : x
  2. Step 2: Convert to fraction form
    2,954.38/4,430.50 = 979.64/x
  3. Step 3: Cross multiply
    2,954.38x = 4,430.50 × 979.64
  4. Step 4: Simplify right side
    2,954.38x = 4,340,295.02
  5. Step 5: Solve for x
    x = 4,340,295.02/2,954.38
  6. Step 6: Final answer
    x = 1,469.11

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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.