Home / 1,518.09-2,275.38-696.21

Finding the Fourth Proportional to 1,518.09, 2,275.38 and 696.21

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Solution

The fourth proportional to 1,518.09, 2,275.38 and 696.21 is: 1,043.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.09 : 2,275.38 = 696.21 : x
  2. Step 2: Convert to fraction form
    1,518.09/2,275.38 = 696.21/x
  3. Step 3: Cross multiply
    1,518.09x = 2,275.38 × 696.21
  4. Step 4: Simplify right side
    1,518.09x = 1,584,142.31
  5. Step 5: Solve for x
    x = 1,584,142.31/1,518.09
  6. Step 6: Final answer
    x = 1,043.51

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.