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Finding the Fourth Proportional to 2,804.40, 4,206.69 and 856.60

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Solution

The fourth proportional to 2,804.40, 4,206.69 and 856.60 is: 1,284.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,804.40 : 4,206.69 = 856.60 : x
  2. Step 2: Convert to fraction form
    2,804.40/4,206.69 = 856.60/x
  3. Step 3: Cross multiply
    2,804.40x = 4,206.69 × 856.60
  4. Step 4: Simplify right side
    2,804.40x = 3,603,450.65
  5. Step 5: Solve for x
    x = 3,603,450.65/2,804.40
  6. Step 6: Final answer
    x = 1,284.93

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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.