Home / 1,578.68-2,175.62-1,135.81

Finding the Fourth Proportional to 1,578.68, 2,175.62 and 1,135.81

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Solution

The fourth proportional to 1,578.68, 2,175.62 and 1,135.81 is: 1,565.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.68 : 2,175.62 = 1,135.81 : x
  2. Step 2: Convert to fraction form
    1,578.68/2,175.62 = 1,135.81/x
  3. Step 3: Cross multiply
    1,578.68x = 2,175.62 × 1,135.81
  4. Step 4: Simplify right side
    1,578.68x = 2,471,090.95
  5. Step 5: Solve for x
    x = 2,471,090.95/1,578.68
  6. Step 6: Final answer
    x = 1,565.29

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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.