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Finding the Fourth Proportional to 1,368.16, 2,052.37 and 394.40

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Solution

The fourth proportional to 1,368.16, 2,052.37 and 394.40 is: 591.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.16 : 2,052.37 = 394.40 : x
  2. Step 2: Convert to fraction form
    1,368.16/2,052.37 = 394.40/x
  3. Step 3: Cross multiply
    1,368.16x = 2,052.37 × 394.40
  4. Step 4: Simplify right side
    1,368.16x = 809,454.73
  5. Step 5: Solve for x
    x = 809,454.73/1,368.16
  6. Step 6: Final answer
    x = 591.64

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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.