Home / 2,140.25-2,953.55-1,208.75

Finding the Fourth Proportional to 2,140.25, 2,953.55 and 1,208.75

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Solution

The fourth proportional to 2,140.25, 2,953.55 and 1,208.75 is: 1,668.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.25 : 2,953.55 = 1,208.75 : x
  2. Step 2: Convert to fraction form
    2,140.25/2,953.55 = 1,208.75/x
  3. Step 3: Cross multiply
    2,140.25x = 2,953.55 × 1,208.75
  4. Step 4: Simplify right side
    2,140.25x = 3,570,097.52
  5. Step 5: Solve for x
    x = 3,570,097.52/2,140.25
  6. Step 6: Final answer
    x = 1,668.08

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Half scale
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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.