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Finding the Fourth Proportional to 3,830.34, 5,743 and 1,855.45

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Solution

The fourth proportional to 3,830.34, 5,743 and 1,855.45 is: 2,781.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,830.34 : 5,743 = 1,855.45 : x
  2. Step 2: Convert to fraction form
    3,830.34/5,743 = 1,855.45/x
  3. Step 3: Cross multiply
    3,830.34x = 5,743 × 1,855.45
  4. Step 4: Simplify right side
    3,830.34x = 10,655,849.35
  5. Step 5: Solve for x
    x = 10,655,849.35/3,830.34
  6. Step 6: Final answer
    x = 2,781.96

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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.