Home / 1,913.80-2,641.44-1,128.04

Finding the Fourth Proportional to 1,913.80, 2,641.44 and 1,128.04

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Solution

The fourth proportional to 1,913.80, 2,641.44 and 1,128.04 is: 1,556.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.80 : 2,641.44 = 1,128.04 : x
  2. Step 2: Convert to fraction form
    1,913.80/2,641.44 = 1,128.04/x
  3. Step 3: Cross multiply
    1,913.80x = 2,641.44 × 1,128.04
  4. Step 4: Simplify right side
    1,913.80x = 2,979,649.98
  5. Step 5: Solve for x
    x = 2,979,649.98/1,913.80
  6. Step 6: Final answer
    x = 1,556.93

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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.