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Finding the Fourth Proportional to 1,266.88, 1,900.39 and 401.13

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Solution

The fourth proportional to 1,266.88, 1,900.39 and 401.13 is: 601.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.88 : 1,900.39 = 401.13 : x
  2. Step 2: Convert to fraction form
    1,266.88/1,900.39 = 401.13/x
  3. Step 3: Cross multiply
    1,266.88x = 1,900.39 × 401.13
  4. Step 4: Simplify right side
    1,266.88x = 762,303.44
  5. Step 5: Solve for x
    x = 762,303.44/1,266.88
  6. Step 6: Final answer
    x = 601.72

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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.