Home / 1,391.45-1,918.58-1,293.03

Finding the Fourth Proportional to 1,391.45, 1,918.58 and 1,293.03

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Solution

The fourth proportional to 1,391.45, 1,918.58 and 1,293.03 is: 1,782.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.45 : 1,918.58 = 1,293.03 : x
  2. Step 2: Convert to fraction form
    1,391.45/1,918.58 = 1,293.03/x
  3. Step 3: Cross multiply
    1,391.45x = 1,918.58 × 1,293.03
  4. Step 4: Simplify right side
    1,391.45x = 2,480,775.03
  5. Step 5: Solve for x
    x = 2,480,775.03/1,391.45
  6. Step 6: Final answer
    x = 1,782.88

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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.