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Finding the Fourth Proportional to 1,919.58, 2,878.76 and 823.25

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Solution

The fourth proportional to 1,919.58, 2,878.76 and 823.25 is: 1,234.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.58 : 2,878.76 = 823.25 : x
  2. Step 2: Convert to fraction form
    1,919.58/2,878.76 = 823.25/x
  3. Step 3: Cross multiply
    1,919.58x = 2,878.76 × 823.25
  4. Step 4: Simplify right side
    1,919.58x = 2,369,920.66
  5. Step 5: Solve for x
    x = 2,369,920.66/1,919.58
  6. Step 6: Final answer
    x = 1,234.60

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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.