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Finding the Fourth Proportional to 1,920.35, 2,879.57 and 995.66

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Solution

The fourth proportional to 1,920.35, 2,879.57 and 995.66 is: 1,492.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.35 : 2,879.57 = 995.66 : x
  2. Step 2: Convert to fraction form
    1,920.35/2,879.57 = 995.66/x
  3. Step 3: Cross multiply
    1,920.35x = 2,879.57 × 995.66
  4. Step 4: Simplify right side
    1,920.35x = 2,867,072.67
  5. Step 5: Solve for x
    x = 2,867,072.67/1,920.35
  6. Step 6: Final answer
    x = 1,492.99

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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.