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Finding the Fourth Proportional to 3,012.58, 4,519.69 and 1,257

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Solution

The fourth proportional to 3,012.58, 4,519.69 and 1,257 is: 1,885.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,012.58 : 4,519.69 = 1,257 : x
  2. Step 2: Convert to fraction form
    3,012.58/4,519.69 = 1,257/x
  3. Step 3: Cross multiply
    3,012.58x = 4,519.69 × 1,257
  4. Step 4: Simplify right side
    3,012.58x = 5,681,250.33
  5. Step 5: Solve for x
    x = 5,681,250.33/3,012.58
  6. Step 6: Final answer
    x = 1,885.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.