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Finding the Fourth Proportional to 3,955.78, 5,939.84 and 3,780.52

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Solution

The fourth proportional to 3,955.78, 5,939.84 and 3,780.52 is: 5,676.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,955.78 : 5,939.84 = 3,780.52 : x
  2. Step 2: Convert to fraction form
    3,955.78/5,939.84 = 3,780.52/x
  3. Step 3: Cross multiply
    3,955.78x = 5,939.84 × 3,780.52
  4. Step 4: Simplify right side
    3,955.78x = 22,455,683.92
  5. Step 5: Solve for x
    x = 22,455,683.92/3,955.78
  6. Step 6: Final answer
    x = 5,676.68

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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.