Home / 1,293.24-1,785.90-1,290.60

Finding the Fourth Proportional to 1,293.24, 1,785.90 and 1,290.60

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Solution

The fourth proportional to 1,293.24, 1,785.90 and 1,290.60 is: 1,782.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.24 : 1,785.90 = 1,290.60 : x
  2. Step 2: Convert to fraction form
    1,293.24/1,785.90 = 1,290.60/x
  3. Step 3: Cross multiply
    1,293.24x = 1,785.90 × 1,290.60
  4. Step 4: Simplify right side
    1,293.24x = 2,304,882.54
  5. Step 5: Solve for x
    x = 2,304,882.54/1,293.24
  6. Step 6: Final answer
    x = 1,782.25

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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.