Home / 2,380.55-3,285.12-1,318.39

Finding the Fourth Proportional to 2,380.55, 3,285.12 and 1,318.39

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Solution

The fourth proportional to 2,380.55, 3,285.12 and 1,318.39 is: 1,819.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.55 : 3,285.12 = 1,318.39 : x
  2. Step 2: Convert to fraction form
    2,380.55/3,285.12 = 1,318.39/x
  3. Step 3: Cross multiply
    2,380.55x = 3,285.12 × 1,318.39
  4. Step 4: Simplify right side
    2,380.55x = 4,331,069.36
  5. Step 5: Solve for x
    x = 4,331,069.36/2,380.55
  6. Step 6: Final answer
    x = 1,819.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.