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Finding the Fourth Proportional to 3,855.90, 5,783.82 and 934.20

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Solution

The fourth proportional to 3,855.90, 5,783.82 and 934.20 is: 1,401.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.90 : 5,783.82 = 934.20 : x
  2. Step 2: Convert to fraction form
    3,855.90/5,783.82 = 934.20/x
  3. Step 3: Cross multiply
    3,855.90x = 5,783.82 × 934.20
  4. Step 4: Simplify right side
    3,855.90x = 5,403,239.97
  5. Step 5: Solve for x
    x = 5,403,239.97/3,855.90
  6. Step 6: Final answer
    x = 1,401.29

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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.