Home / 3,415.78-5,123.60-1,107.28

Finding the Fourth Proportional to 3,415.78, 5,123.60 and 1,107.28

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Solution

The fourth proportional to 3,415.78, 5,123.60 and 1,107.28 is: 1,660.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.78 : 5,123.60 = 1,107.28 : x
  2. Step 2: Convert to fraction form
    3,415.78/5,123.60 = 1,107.28/x
  3. Step 3: Cross multiply
    3,415.78x = 5,123.60 × 1,107.28
  4. Step 4: Simplify right side
    3,415.78x = 5,673,228.65
  5. Step 5: Solve for x
    x = 5,673,228.65/3,415.78
  6. Step 6: Final answer
    x = 1,660.89

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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.