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Finding the Fourth Proportional to 1,394.44, 1,924.50 and 871

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Solution

The fourth proportional to 1,394.44, 1,924.50 and 871 is: 1,202.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.44 : 1,924.50 = 871 : x
  2. Step 2: Convert to fraction form
    1,394.44/1,924.50 = 871/x
  3. Step 3: Cross multiply
    1,394.44x = 1,924.50 × 871
  4. Step 4: Simplify right side
    1,394.44x = 1,676,239.50
  5. Step 5: Solve for x
    x = 1,676,239.50/1,394.44
  6. Step 6: Final answer
    x = 1,202.09

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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.