Home / 3,118.43-4,678.14-1,170.78

Finding the Fourth Proportional to 3,118.43, 4,678.14 and 1,170.78

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Solution

The fourth proportional to 3,118.43, 4,678.14 and 1,170.78 is: 1,756.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.43 : 4,678.14 = 1,170.78 : x
  2. Step 2: Convert to fraction form
    3,118.43/4,678.14 = 1,170.78/x
  3. Step 3: Cross multiply
    3,118.43x = 4,678.14 × 1,170.78
  4. Step 4: Simplify right side
    3,118.43x = 5,477,072.75
  5. Step 5: Solve for x
    x = 5,477,072.75/3,118.43
  6. Step 6: Final answer
    x = 1,756.36

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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.