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Finding the Fourth Proportional to 2,389, 3,584.94 and 1,021

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Solution

The fourth proportional to 2,389, 3,584.94 and 1,021 is: 1,532.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389 : 3,584.94 = 1,021 : x
  2. Step 2: Convert to fraction form
    2,389/3,584.94 = 1,021/x
  3. Step 3: Cross multiply
    2,389x = 3,584.94 × 1,021
  4. Step 4: Simplify right side
    2,389x = 3,660,223.74
  5. Step 5: Solve for x
    x = 3,660,223.74/2,389
  6. Step 6: Final answer
    x = 1,532.12

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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.