Home / 1,519.71-2,097.19-890.36

Finding the Fourth Proportional to 1,519.71, 2,097.19 and 890.36

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Solution

The fourth proportional to 1,519.71, 2,097.19 and 890.36 is: 1,228.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.71 : 2,097.19 = 890.36 : x
  2. Step 2: Convert to fraction form
    1,519.71/2,097.19 = 890.36/x
  3. Step 3: Cross multiply
    1,519.71x = 2,097.19 × 890.36
  4. Step 4: Simplify right side
    1,519.71x = 1,867,254.09
  5. Step 5: Solve for x
    x = 1,867,254.09/1,519.71
  6. Step 6: Final answer
    x = 1,228.69

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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.