Home / 3,678.52-5,515.96-1,213.28

Finding the Fourth Proportional to 3,678.52, 5,515.96 and 1,213.28

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Solution

The fourth proportional to 3,678.52, 5,515.96 and 1,213.28 is: 1,819.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.52 : 5,515.96 = 1,213.28 : x
  2. Step 2: Convert to fraction form
    3,678.52/5,515.96 = 1,213.28/x
  3. Step 3: Cross multiply
    3,678.52x = 5,515.96 × 1,213.28
  4. Step 4: Simplify right side
    3,678.52x = 6,692,403.95
  5. Step 5: Solve for x
    x = 6,692,403.95/3,678.52
  6. Step 6: Final answer
    x = 1,819.32

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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.