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Finding the Fourth Proportional to 1,268.94, 1,904.08 and 619.62

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Solution

The fourth proportional to 1,268.94, 1,904.08 and 619.62 is: 929.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.94 : 1,904.08 = 619.62 : x
  2. Step 2: Convert to fraction form
    1,268.94/1,904.08 = 619.62/x
  3. Step 3: Cross multiply
    1,268.94x = 1,904.08 × 619.62
  4. Step 4: Simplify right side
    1,268.94x = 1,179,806.05
  5. Step 5: Solve for x
    x = 1,179,806.05/1,268.94
  6. Step 6: Final answer
    x = 929.76

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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.