Home / 3,478.05-5,212.19-1,918.78

Finding the Fourth Proportional to 3,478.05, 5,212.19 and 1,918.78

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Solution

The fourth proportional to 3,478.05, 5,212.19 and 1,918.78 is: 2,875.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.05 : 5,212.19 = 1,918.78 : x
  2. Step 2: Convert to fraction form
    3,478.05/5,212.19 = 1,918.78/x
  3. Step 3: Cross multiply
    3,478.05x = 5,212.19 × 1,918.78
  4. Step 4: Simplify right side
    3,478.05x = 10,001,037.69
  5. Step 5: Solve for x
    x = 10,001,037.69/3,478.05
  6. Step 6: Final answer
    x = 2,875.47

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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.