Home / 1,628.19-2,442.90-979.38

Finding the Fourth Proportional to 1,628.19, 2,442.90 and 979.38

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Solution

The fourth proportional to 1,628.19, 2,442.90 and 979.38 is: 1,469.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.19 : 2,442.90 = 979.38 : x
  2. Step 2: Convert to fraction form
    1,628.19/2,442.90 = 979.38/x
  3. Step 3: Cross multiply
    1,628.19x = 2,442.90 × 979.38
  4. Step 4: Simplify right side
    1,628.19x = 2,392,527.40
  5. Step 5: Solve for x
    x = 2,392,527.40/1,628.19
  6. Step 6: Final answer
    x = 1,469.44

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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.