Home / 5,145.37-7,718.06-1,249.78

Finding the Fourth Proportional to 5,145.37, 7,718.06 and 1,249.78

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Solution

The fourth proportional to 5,145.37, 7,718.06 and 1,249.78 is: 1,874.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.37 : 7,718.06 = 1,249.78 : x
  2. Step 2: Convert to fraction form
    5,145.37/7,718.06 = 1,249.78/x
  3. Step 3: Cross multiply
    5,145.37x = 7,718.06 × 1,249.78
  4. Step 4: Simplify right side
    5,145.37x = 9,645,877.03
  5. Step 5: Solve for x
    x = 9,645,877.03/5,145.37
  6. Step 6: Final answer
    x = 1,874.67

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Double scale
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Similar ratio
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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.