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Finding the Fourth Proportional to 1,392.00, 2,084.81 and 903.57

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Solution

The fourth proportional to 1,392.00, 2,084.81 and 903.57 is: 1,353.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.00 : 2,084.81 = 903.57 : x
  2. Step 2: Convert to fraction form
    1,392.00/2,084.81 = 903.57/x
  3. Step 3: Cross multiply
    1,392.00x = 2,084.81 × 903.57
  4. Step 4: Simplify right side
    1,392.00x = 1,883,759.44
  5. Step 5: Solve for x
    x = 1,883,759.44/1,392.00
  6. Step 6: Final answer
    x = 1,353.28

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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.