Home / 2,120.14-2,925.44-1,175.78

Finding the Fourth Proportional to 2,120.14, 2,925.44 and 1,175.78

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Solution

The fourth proportional to 2,120.14, 2,925.44 and 1,175.78 is: 1,622.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.14 : 2,925.44 = 1,175.78 : x
  2. Step 2: Convert to fraction form
    2,120.14/2,925.44 = 1,175.78/x
  3. Step 3: Cross multiply
    2,120.14x = 2,925.44 × 1,175.78
  4. Step 4: Simplify right side
    2,120.14x = 3,439,676.82
  5. Step 5: Solve for x
    x = 3,439,676.82/2,120.14
  6. Step 6: Final answer
    x = 1,622.38

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Double scale
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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.