Home / 1,578.93-2,176.66-1,080.78

Finding the Fourth Proportional to 1,578.93, 2,176.66 and 1,080.78

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Solution

The fourth proportional to 1,578.93, 2,176.66 and 1,080.78 is: 1,489.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.93 : 2,176.66 = 1,080.78 : x
  2. Step 2: Convert to fraction form
    1,578.93/2,176.66 = 1,080.78/x
  3. Step 3: Cross multiply
    1,578.93x = 2,176.66 × 1,080.78
  4. Step 4: Simplify right side
    1,578.93x = 2,352,490.59
  5. Step 5: Solve for x
    x = 2,352,490.59/1,578.93
  6. Step 6: Final answer
    x = 1,489.93

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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.