Home / 1,885.21-2,601.11-1,381.79

Finding the Fourth Proportional to 1,885.21, 2,601.11 and 1,381.79

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Solution

The fourth proportional to 1,885.21, 2,601.11 and 1,381.79 is: 1,906.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.21 : 2,601.11 = 1,381.79 : x
  2. Step 2: Convert to fraction form
    1,885.21/2,601.11 = 1,381.79/x
  3. Step 3: Cross multiply
    1,885.21x = 2,601.11 × 1,381.79
  4. Step 4: Simplify right side
    1,885.21x = 3,594,197.74
  5. Step 5: Solve for x
    x = 3,594,197.74/1,885.21
  6. Step 6: Final answer
    x = 1,906.53

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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.