Home / 2,578.21-3,557.11-1,515.64

Finding the Fourth Proportional to 2,578.21, 3,557.11 and 1,515.64

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Solution

The fourth proportional to 2,578.21, 3,557.11 and 1,515.64 is: 2,091.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.21 : 3,557.11 = 1,515.64 : x
  2. Step 2: Convert to fraction form
    2,578.21/3,557.11 = 1,515.64/x
  3. Step 3: Cross multiply
    2,578.21x = 3,557.11 × 1,515.64
  4. Step 4: Simplify right side
    2,578.21x = 5,391,284.20
  5. Step 5: Solve for x
    x = 5,391,284.20/2,578.21
  6. Step 6: Final answer
    x = 2,091.10

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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.