Home / 3,611.81-4,985.34-2,119.79

Finding the Fourth Proportional to 3,611.81, 4,985.34 and 2,119.79

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Solution

The fourth proportional to 3,611.81, 4,985.34 and 2,119.79 is: 2,925.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.81 : 4,985.34 = 2,119.79 : x
  2. Step 2: Convert to fraction form
    3,611.81/4,985.34 = 2,119.79/x
  3. Step 3: Cross multiply
    3,611.81x = 4,985.34 × 2,119.79
  4. Step 4: Simplify right side
    3,611.81x = 10,567,873.88
  5. Step 5: Solve for x
    x = 10,567,873.88/3,611.81
  6. Step 6: Final answer
    x = 2,925.92

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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.