Home / 2,905.40-4,005.35-2,065.79

Finding the Fourth Proportional to 2,905.40, 4,005.35 and 2,065.79

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Solution

The fourth proportional to 2,905.40, 4,005.35 and 2,065.79 is: 2,847.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,905.40 : 4,005.35 = 2,065.79 : x
  2. Step 2: Convert to fraction form
    2,905.40/4,005.35 = 2,065.79/x
  3. Step 3: Cross multiply
    2,905.40x = 4,005.35 × 2,065.79
  4. Step 4: Simplify right side
    2,905.40x = 8,274,181.62
  5. Step 5: Solve for x
    x = 8,274,181.62/2,905.40
  6. Step 6: Final answer
    x = 2,847.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.