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Finding the Fourth Proportional to 2,409.64, 3,324.90 and 1,361.40

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Solution

The fourth proportional to 2,409.64, 3,324.90 and 1,361.40 is: 1,878.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,409.64 : 3,324.90 = 1,361.40 : x
  2. Step 2: Convert to fraction form
    2,409.64/3,324.90 = 1,361.40/x
  3. Step 3: Cross multiply
    2,409.64x = 3,324.90 × 1,361.40
  4. Step 4: Simplify right side
    2,409.64x = 4,526,518.86
  5. Step 5: Solve for x
    x = 4,526,518.86/2,409.64
  6. Step 6: Final answer
    x = 1,878.50

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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.