Home / 1,181.27-1,771.20-401.05

Finding the Fourth Proportional to 1,181.27, 1,771.20 and 401.05

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Solution

The fourth proportional to 1,181.27, 1,771.20 and 401.05 is: 601.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.27 : 1,771.20 = 401.05 : x
  2. Step 2: Convert to fraction form
    1,181.27/1,771.20 = 401.05/x
  3. Step 3: Cross multiply
    1,181.27x = 1,771.20 × 401.05
  4. Step 4: Simplify right side
    1,181.27x = 710,339.76
  5. Step 5: Solve for x
    x = 710,339.76/1,181.27
  6. Step 6: Final answer
    x = 601.34

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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.