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Finding the Fourth Proportional to 1,919.62, 2,877.02 and 822.70

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Solution

The fourth proportional to 1,919.62, 2,877.02 and 822.70 is: 1,233.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.62 : 2,877.02 = 822.70 : x
  2. Step 2: Convert to fraction form
    1,919.62/2,877.02 = 822.70/x
  3. Step 3: Cross multiply
    1,919.62x = 2,877.02 × 822.70
  4. Step 4: Simplify right side
    1,919.62x = 2,366,924.35
  5. Step 5: Solve for x
    x = 2,366,924.35/1,919.62
  6. Step 6: Final answer
    x = 1,233.02

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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.