Home / 1,918.10-2,647.44-1,172.70

Finding the Fourth Proportional to 1,918.10, 2,647.44 and 1,172.70

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Solution

The fourth proportional to 1,918.10, 2,647.44 and 1,172.70 is: 1,618.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.10 : 2,647.44 = 1,172.70 : x
  2. Step 2: Convert to fraction form
    1,918.10/2,647.44 = 1,172.70/x
  3. Step 3: Cross multiply
    1,918.10x = 2,647.44 × 1,172.70
  4. Step 4: Simplify right side
    1,918.10x = 3,104,652.89
  5. Step 5: Solve for x
    x = 3,104,652.89/1,918.10
  6. Step 6: Final answer
    x = 1,618.61

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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.