Home / 1,285.29-1,770.53-1,219.41

Finding the Fourth Proportional to 1,285.29, 1,770.53 and 1,219.41

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Solution

The fourth proportional to 1,285.29, 1,770.53 and 1,219.41 is: 1,679.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.29 : 1,770.53 = 1,219.41 : x
  2. Step 2: Convert to fraction form
    1,285.29/1,770.53 = 1,219.41/x
  3. Step 3: Cross multiply
    1,285.29x = 1,770.53 × 1,219.41
  4. Step 4: Simplify right side
    1,285.29x = 2,158,995.89
  5. Step 5: Solve for x
    x = 2,158,995.89/1,285.29
  6. Step 6: Final answer
    x = 1,679.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.