Home / 1,285.45-1,926.72-1,181.61

Finding the Fourth Proportional to 1,285.45, 1,926.72 and 1,181.61

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Solution

The fourth proportional to 1,285.45, 1,926.72 and 1,181.61 is: 1,771.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.45 : 1,926.72 = 1,181.61 : x
  2. Step 2: Convert to fraction form
    1,285.45/1,926.72 = 1,181.61/x
  3. Step 3: Cross multiply
    1,285.45x = 1,926.72 × 1,181.61
  4. Step 4: Simplify right side
    1,285.45x = 2,276,631.62
  5. Step 5: Solve for x
    x = 2,276,631.62/1,285.45
  6. Step 6: Final answer
    x = 1,771.08

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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.