Home / 2,115.14-2,918.95-1,171.08

Finding the Fourth Proportional to 2,115.14, 2,918.95 and 1,171.08

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Solution

The fourth proportional to 2,115.14, 2,918.95 and 1,171.08 is: 1,616.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.14 : 2,918.95 = 1,171.08 : x
  2. Step 2: Convert to fraction form
    2,115.14/2,918.95 = 1,171.08/x
  3. Step 3: Cross multiply
    2,115.14x = 2,918.95 × 1,171.08
  4. Step 4: Simplify right side
    2,115.14x = 3,418,321.04
  5. Step 5: Solve for x
    x = 3,418,321.04/2,115.14
  6. Step 6: Final answer
    x = 1,616.12

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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.