Home / 1,289.86-1,926.05-1,012.84

Finding the Fourth Proportional to 1,289.86, 1,926.05 and 1,012.84

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Solution

The fourth proportional to 1,289.86, 1,926.05 and 1,012.84 is: 1,512.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.86 : 1,926.05 = 1,012.84 : x
  2. Step 2: Convert to fraction form
    1,289.86/1,926.05 = 1,012.84/x
  3. Step 3: Cross multiply
    1,289.86x = 1,926.05 × 1,012.84
  4. Step 4: Simplify right side
    1,289.86x = 1,950,770.60
  5. Step 5: Solve for x
    x = 1,950,770.60/1,289.86
  6. Step 6: Final answer
    x = 1,512.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.