Home / 1,619.48-2,218.68-1,561.16

Finding the Fourth Proportional to 1,619.48, 2,218.68 and 1,561.16

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Solution

The fourth proportional to 1,619.48, 2,218.68 and 1,561.16 is: 2,138.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.48 : 2,218.68 = 1,561.16 : x
  2. Step 2: Convert to fraction form
    1,619.48/2,218.68 = 1,561.16/x
  3. Step 3: Cross multiply
    1,619.48x = 2,218.68 × 1,561.16
  4. Step 4: Simplify right side
    1,619.48x = 3,463,706.66
  5. Step 5: Solve for x
    x = 3,463,706.66/1,619.48
  6. Step 6: Final answer
    x = 2,138.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.