Home / 1,578.41-2,176.18-1,080.19

Finding the Fourth Proportional to 1,578.41, 2,176.18 and 1,080.19

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Solution

The fourth proportional to 1,578.41, 2,176.18 and 1,080.19 is: 1,489.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.41 : 2,176.18 = 1,080.19 : x
  2. Step 2: Convert to fraction form
    1,578.41/2,176.18 = 1,080.19/x
  3. Step 3: Cross multiply
    1,578.41x = 2,176.18 × 1,080.19
  4. Step 4: Simplify right side
    1,578.41x = 2,350,687.89
  5. Step 5: Solve for x
    x = 2,350,687.89/1,578.41
  6. Step 6: Final answer
    x = 1,489.28

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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.