Home / 3,187.78-4,782.22-1,213.58

Finding the Fourth Proportional to 3,187.78, 4,782.22 and 1,213.58

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Solution

The fourth proportional to 3,187.78, 4,782.22 and 1,213.58 is: 1,820.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.78 : 4,782.22 = 1,213.58 : x
  2. Step 2: Convert to fraction form
    3,187.78/4,782.22 = 1,213.58/x
  3. Step 3: Cross multiply
    3,187.78x = 4,782.22 × 1,213.58
  4. Step 4: Simplify right side
    3,187.78x = 5,803,606.55
  5. Step 5: Solve for x
    x = 5,803,606.55/3,187.78
  6. Step 6: Final answer
    x = 1,820.58

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1.5x scale

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.