Home / 2,405.12-3,319.20-1,356.96

Finding the Fourth Proportional to 2,405.12, 3,319.20 and 1,356.96

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Solution

The fourth proportional to 2,405.12, 3,319.20 and 1,356.96 is: 1,872.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,405.12 : 3,319.20 = 1,356.96 : x
  2. Step 2: Convert to fraction form
    2,405.12/3,319.20 = 1,356.96/x
  3. Step 3: Cross multiply
    2,405.12x = 3,319.20 × 1,356.96
  4. Step 4: Simplify right side
    2,405.12x = 4,504,021.63
  5. Step 5: Solve for x
    x = 4,504,021.63/2,405.12
  6. Step 6: Final answer
    x = 1,872.68

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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.