Home / 1,485.75-2,046.76-1,249.70

Finding the Fourth Proportional to 1,485.75, 2,046.76 and 1,249.70

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Solution

The fourth proportional to 1,485.75, 2,046.76 and 1,249.70 is: 1,721.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.75 : 2,046.76 = 1,249.70 : x
  2. Step 2: Convert to fraction form
    1,485.75/2,046.76 = 1,249.70/x
  3. Step 3: Cross multiply
    1,485.75x = 2,046.76 × 1,249.70
  4. Step 4: Simplify right side
    1,485.75x = 2,557,837.96
  5. Step 5: Solve for x
    x = 2,557,837.96/1,485.75
  6. Step 6: Final answer
    x = 1,721.58

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Half scale
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Double scale
Find fourth proportional to 1,486.75, 2,048.14 and 1,250.70
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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.