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Finding the Fourth Proportional to 1,268.75, 1,901.00 and 1,084.28

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Solution

The fourth proportional to 1,268.75, 1,901.00 and 1,084.28 is: 1,624.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.75 : 1,901.00 = 1,084.28 : x
  2. Step 2: Convert to fraction form
    1,268.75/1,901.00 = 1,084.28/x
  3. Step 3: Cross multiply
    1,268.75x = 1,901.00 × 1,084.28
  4. Step 4: Simplify right side
    1,268.75x = 2,061,209.49
  5. Step 5: Solve for x
    x = 2,061,209.49/1,268.75
  6. Step 6: Final answer
    x = 1,624.60

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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.