Home / 1,578.51-2,174.70-1,135.64

Finding the Fourth Proportional to 1,578.51, 2,174.70 and 1,135.64

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Solution

The fourth proportional to 1,578.51, 2,174.70 and 1,135.64 is: 1,564.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.51 : 2,174.70 = 1,135.64 : x
  2. Step 2: Convert to fraction form
    1,578.51/2,174.70 = 1,135.64/x
  3. Step 3: Cross multiply
    1,578.51x = 2,174.70 × 1,135.64
  4. Step 4: Simplify right side
    1,578.51x = 2,469,676.31
  5. Step 5: Solve for x
    x = 2,469,676.31/1,578.51
  6. Step 6: Final answer
    x = 1,564.56

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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.