Home / 2,102.51-3,153.85-786.13

Finding the Fourth Proportional to 2,102.51, 3,153.85 and 786.13

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Solution

The fourth proportional to 2,102.51, 3,153.85 and 786.13 is: 1,179.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.51 : 3,153.85 = 786.13 : x
  2. Step 2: Convert to fraction form
    2,102.51/3,153.85 = 786.13/x
  3. Step 3: Cross multiply
    2,102.51x = 3,153.85 × 786.13
  4. Step 4: Simplify right side
    2,102.51x = 2,479,339.54
  5. Step 5: Solve for x
    x = 2,479,339.54/2,102.51
  6. Step 6: Final answer
    x = 1,179.23

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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.