Home / 1,939.21-2,886.88-1,927.68

Finding the Fourth Proportional to 1,939.21, 2,886.88 and 1,927.68

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Solution

The fourth proportional to 1,939.21, 2,886.88 and 1,927.68 is: 2,869.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.21 : 2,886.88 = 1,927.68 : x
  2. Step 2: Convert to fraction form
    1,939.21/2,886.88 = 1,927.68/x
  3. Step 3: Cross multiply
    1,939.21x = 2,886.88 × 1,927.68
  4. Step 4: Simplify right side
    1,939.21x = 5,564,968.81
  5. Step 5: Solve for x
    x = 5,564,968.81/1,939.21
  6. Step 6: Final answer
    x = 2,869.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.