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Finding the Fourth Proportional to 1,216.87, 1,826.85 and 1,210.75

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Solution

The fourth proportional to 1,216.87, 1,826.85 and 1,210.75 is: 1,817.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.87 : 1,826.85 = 1,210.75 : x
  2. Step 2: Convert to fraction form
    1,216.87/1,826.85 = 1,210.75/x
  3. Step 3: Cross multiply
    1,216.87x = 1,826.85 × 1,210.75
  4. Step 4: Simplify right side
    1,216.87x = 2,211,858.64
  5. Step 5: Solve for x
    x = 2,211,858.64/1,216.87
  6. Step 6: Final answer
    x = 1,817.66

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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.