Home / 1,644.18-2,268.38-971.85

Finding the Fourth Proportional to 1,644.18, 2,268.38 and 971.85

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Solution

The fourth proportional to 1,644.18, 2,268.38 and 971.85 is: 1,340.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644.18 : 2,268.38 = 971.85 : x
  2. Step 2: Convert to fraction form
    1,644.18/2,268.38 = 971.85/x
  3. Step 3: Cross multiply
    1,644.18x = 2,268.38 × 971.85
  4. Step 4: Simplify right side
    1,644.18x = 2,204,514.37
  5. Step 5: Solve for x
    x = 2,204,514.37/1,644.18
  6. Step 6: Final answer
    x = 1,340.80

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1.5x scale

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.