Home / 2,321.12-3,480.60-860.24

Finding the Fourth Proportional to 2,321.12, 3,480.60 and 860.24

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Solution

The fourth proportional to 2,321.12, 3,480.60 and 860.24 is: 1,289.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,321.12 : 3,480.60 = 860.24 : x
  2. Step 2: Convert to fraction form
    2,321.12/3,480.60 = 860.24/x
  3. Step 3: Cross multiply
    2,321.12x = 3,480.60 × 860.24
  4. Step 4: Simplify right side
    2,321.12x = 2,994,151.34
  5. Step 5: Solve for x
    x = 2,994,151.34/2,321.12
  6. Step 6: Final answer
    x = 1,289.96

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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.