Home / 1,913.78-2,869.11-1,181.81

Finding the Fourth Proportional to 1,913.78, 2,869.11 and 1,181.81

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Solution

The fourth proportional to 1,913.78, 2,869.11 and 1,181.81 is: 1,771.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.78 : 2,869.11 = 1,181.81 : x
  2. Step 2: Convert to fraction form
    1,913.78/2,869.11 = 1,181.81/x
  3. Step 3: Cross multiply
    1,913.78x = 2,869.11 × 1,181.81
  4. Step 4: Simplify right side
    1,913.78x = 3,390,728.54
  5. Step 5: Solve for x
    x = 3,390,728.54/1,913.78
  6. Step 6: Final answer
    x = 1,771.75

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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.