Home / 3,678.75-5,518.40-1,213.52

Finding the Fourth Proportional to 3,678.75, 5,518.40 and 1,213.52

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Solution

The fourth proportional to 3,678.75, 5,518.40 and 1,213.52 is: 1,820.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.75 : 5,518.40 = 1,213.52 : x
  2. Step 2: Convert to fraction form
    3,678.75/5,518.40 = 1,213.52/x
  3. Step 3: Cross multiply
    3,678.75x = 5,518.40 × 1,213.52
  4. Step 4: Simplify right side
    3,678.75x = 6,696,688.77
  5. Step 5: Solve for x
    x = 6,696,688.77/3,678.75
  6. Step 6: Final answer
    x = 1,820.37

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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.