Home / 2,125.28-3,188.37-891.98

Finding the Fourth Proportional to 2,125.28, 3,188.37 and 891.98

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Solution

The fourth proportional to 2,125.28, 3,188.37 and 891.98 is: 1,338.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.28 : 3,188.37 = 891.98 : x
  2. Step 2: Convert to fraction form
    2,125.28/3,188.37 = 891.98/x
  3. Step 3: Cross multiply
    2,125.28x = 3,188.37 × 891.98
  4. Step 4: Simplify right side
    2,125.28x = 2,843,946.33
  5. Step 5: Solve for x
    x = 2,843,946.33/2,125.28
  6. Step 6: Final answer
    x = 1,338.15

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1.5x scale

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.