Home / 2,897.90-3,999.09-1,571.61

Finding the Fourth Proportional to 2,897.90, 3,999.09 and 1,571.61

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Solution

The fourth proportional to 2,897.90, 3,999.09 and 1,571.61 is: 2,168.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,897.90 : 3,999.09 = 1,571.61 : x
  2. Step 2: Convert to fraction form
    2,897.90/3,999.09 = 1,571.61/x
  3. Step 3: Cross multiply
    2,897.90x = 3,999.09 × 1,571.61
  4. Step 4: Simplify right side
    2,897.90x = 6,284,999.39
  5. Step 5: Solve for x
    x = 6,284,999.39/2,897.90
  6. Step 6: Final answer
    x = 2,168.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.