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Finding the Fourth Proportional to 1,268.70, 1,900.27 and 618.06

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Solution

The fourth proportional to 1,268.70, 1,900.27 and 618.06 is: 925.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.70 : 1,900.27 = 618.06 : x
  2. Step 2: Convert to fraction form
    1,268.70/1,900.27 = 618.06/x
  3. Step 3: Cross multiply
    1,268.70x = 1,900.27 × 618.06
  4. Step 4: Simplify right side
    1,268.70x = 1,174,480.88
  5. Step 5: Solve for x
    x = 1,174,480.88/1,268.70
  6. Step 6: Final answer
    x = 925.74

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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.