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Finding the Fourth Proportional to 1,766.42, 2,647.90 and 841.73

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Solution

The fourth proportional to 1,766.42, 2,647.90 and 841.73 is: 1,261.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,766.42 : 2,647.90 = 841.73 : x
  2. Step 2: Convert to fraction form
    1,766.42/2,647.90 = 841.73/x
  3. Step 3: Cross multiply
    1,766.42x = 2,647.90 × 841.73
  4. Step 4: Simplify right side
    1,766.42x = 2,228,816.87
  5. Step 5: Solve for x
    x = 2,228,816.87/1,766.42
  6. Step 6: Final answer
    x = 1,261.77

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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.