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Finding the Fourth Proportional to 2,590, 3,886.44 and 1,222

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Solution

The fourth proportional to 2,590, 3,886.44 and 1,222 is: 1,833.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,590 : 3,886.44 = 1,222 : x
  2. Step 2: Convert to fraction form
    2,590/3,886.44 = 1,222/x
  3. Step 3: Cross multiply
    2,590x = 3,886.44 × 1,222
  4. Step 4: Simplify right side
    2,590x = 4,749,229.68
  5. Step 5: Solve for x
    x = 4,749,229.68/2,590
  6. Step 6: Final answer
    x = 1,833.68

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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.