Home / 1,578.12-2,176.82-1,135.32

Finding the Fourth Proportional to 1,578.12, 2,176.82 and 1,135.32

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Solution

The fourth proportional to 1,578.12, 2,176.82 and 1,135.32 is: 1,566.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.12 : 2,176.82 = 1,135.32 : x
  2. Step 2: Convert to fraction form
    1,578.12/2,176.82 = 1,135.32/x
  3. Step 3: Cross multiply
    1,578.12x = 2,176.82 × 1,135.32
  4. Step 4: Simplify right side
    1,578.12x = 2,471,387.28
  5. Step 5: Solve for x
    x = 2,471,387.28/1,578.12
  6. Step 6: Final answer
    x = 1,566.03

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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.