Home / 1,780.12-2,669.86-481.69

Finding the Fourth Proportional to 1,780.12, 2,669.86 and 481.69

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Solution

The fourth proportional to 1,780.12, 2,669.86 and 481.69 is: 722.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.12 : 2,669.86 = 481.69 : x
  2. Step 2: Convert to fraction form
    1,780.12/2,669.86 = 481.69/x
  3. Step 3: Cross multiply
    1,780.12x = 2,669.86 × 481.69
  4. Step 4: Simplify right side
    1,780.12x = 1,286,030.31
  5. Step 5: Solve for x
    x = 1,286,030.31/1,780.12
  6. Step 6: Final answer
    x = 722.44

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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.