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Finding the Fourth Proportional to 3,189.94, 4,779.50 and 1,954.76

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Solution

The fourth proportional to 3,189.94, 4,779.50 and 1,954.76 is: 2,928.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.94 : 4,779.50 = 1,954.76 : x
  2. Step 2: Convert to fraction form
    3,189.94/4,779.50 = 1,954.76/x
  3. Step 3: Cross multiply
    3,189.94x = 4,779.50 × 1,954.76
  4. Step 4: Simplify right side
    3,189.94x = 9,342,775.42
  5. Step 5: Solve for x
    x = 9,342,775.42/3,189.94
  6. Step 6: Final answer
    x = 2,928.82

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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.