Home / 1,690.19-2,334.75-1,273.69

Finding the Fourth Proportional to 1,690.19, 2,334.75 and 1,273.69

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Solution

The fourth proportional to 1,690.19, 2,334.75 and 1,273.69 is: 1,759.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.19 : 2,334.75 = 1,273.69 : x
  2. Step 2: Convert to fraction form
    1,690.19/2,334.75 = 1,273.69/x
  3. Step 3: Cross multiply
    1,690.19x = 2,334.75 × 1,273.69
  4. Step 4: Simplify right side
    1,690.19x = 2,973,741.36
  5. Step 5: Solve for x
    x = 2,973,741.36/1,690.19
  6. Step 6: Final answer
    x = 1,759.41

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Half scale
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Double 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.