Home / 1,515.39-2,273.90-857.27

Finding the Fourth Proportional to 1,515.39, 2,273.90 and 857.27

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Solution

The fourth proportional to 1,515.39, 2,273.90 and 857.27 is: 1,286.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.39 : 2,273.90 = 857.27 : x
  2. Step 2: Convert to fraction form
    1,515.39/2,273.90 = 857.27/x
  3. Step 3: Cross multiply
    1,515.39x = 2,273.90 × 857.27
  4. Step 4: Simplify right side
    1,515.39x = 1,949,330.60
  5. Step 5: Solve for x
    x = 1,949,330.60/1,515.39
  6. Step 6: Final answer
    x = 1,286.36

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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.