Home / 3,120.10-4,678.89-1,171.24

Finding the Fourth Proportional to 3,120.10, 4,678.89 and 1,171.24

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Solution

The fourth proportional to 3,120.10, 4,678.89 and 1,171.24 is: 1,756.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.10 : 4,678.89 = 1,171.24 : x
  2. Step 2: Convert to fraction form
    3,120.10/4,678.89 = 1,171.24/x
  3. Step 3: Cross multiply
    3,120.10x = 4,678.89 × 1,171.24
  4. Step 4: Simplify right side
    3,120.10x = 5,480,103.12
  5. Step 5: Solve for x
    x = 5,480,103.12/3,120.10
  6. Step 6: Final answer
    x = 1,756.39

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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.