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Finding the Fourth Proportional to 2,897.69, 3,998.80 and 1,571.39

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Solution

The fourth proportional to 2,897.69, 3,998.80 and 1,571.39 is: 2,168.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,897.69 : 3,998.80 = 1,571.39 : x
  2. Step 2: Convert to fraction form
    2,897.69/3,998.80 = 1,571.39/x
  3. Step 3: Cross multiply
    2,897.69x = 3,998.80 × 1,571.39
  4. Step 4: Simplify right side
    2,897.69x = 6,283,674.33
  5. Step 5: Solve for x
    x = 6,283,674.33/2,897.69
  6. Step 6: Final answer
    x = 2,168.51

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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.