Home / 1,921.19-2,651.45-1,175.65

Finding the Fourth Proportional to 1,921.19, 2,651.45 and 1,175.65

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Solution

The fourth proportional to 1,921.19, 2,651.45 and 1,175.65 is: 1,622.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.19 : 2,651.45 = 1,175.65 : x
  2. Step 2: Convert to fraction form
    1,921.19/2,651.45 = 1,175.65/x
  3. Step 3: Cross multiply
    1,921.19x = 2,651.45 × 1,175.65
  4. Step 4: Simplify right side
    1,921.19x = 3,117,164.69
  5. Step 5: Solve for x
    x = 3,117,164.69/1,921.19
  6. Step 6: Final answer
    x = 1,622.52

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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.