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Finding the Fourth Proportional to 1,391.83, 1,919.79 and 895.09

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Solution

The fourth proportional to 1,391.83, 1,919.79 and 895.09 is: 1,234.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.83 : 1,919.79 = 895.09 : x
  2. Step 2: Convert to fraction form
    1,391.83/1,919.79 = 895.09/x
  3. Step 3: Cross multiply
    1,391.83x = 1,919.79 × 895.09
  4. Step 4: Simplify right side
    1,391.83x = 1,718,392.99
  5. Step 5: Solve for x
    x = 1,718,392.99/1,391.83
  6. Step 6: Final answer
    x = 1,234.63

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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.