Home / 1,259.28-1,886.86-1,211.28

Finding the Fourth Proportional to 1,259.28, 1,886.86 and 1,211.28

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Solution

The fourth proportional to 1,259.28, 1,886.86 and 1,211.28 is: 1,814.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259.28 : 1,886.86 = 1,211.28 : x
  2. Step 2: Convert to fraction form
    1,259.28/1,886.86 = 1,211.28/x
  3. Step 3: Cross multiply
    1,259.28x = 1,886.86 × 1,211.28
  4. Step 4: Simplify right side
    1,259.28x = 2,285,515.78
  5. Step 5: Solve for x
    x = 2,285,515.78/1,259.28
  6. Step 6: Final answer
    x = 1,814.94

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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.