Home / 1,917.18-2,646.81-1,288.62

Finding the Fourth Proportional to 1,917.18, 2,646.81 and 1,288.62

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Solution

The fourth proportional to 1,917.18, 2,646.81 and 1,288.62 is: 1,779.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.18 : 2,646.81 = 1,288.62 : x
  2. Step 2: Convert to fraction form
    1,917.18/2,646.81 = 1,288.62/x
  3. Step 3: Cross multiply
    1,917.18x = 2,646.81 × 1,288.62
  4. Step 4: Simplify right side
    1,917.18x = 3,410,732.30
  5. Step 5: Solve for x
    x = 3,410,732.30/1,917.18
  6. Step 6: Final answer
    x = 1,779.04

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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.