Home / 1,387.26-2,064.56-1,335.42

Finding the Fourth Proportional to 1,387.26, 2,064.56 and 1,335.42

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Solution

The fourth proportional to 1,387.26, 2,064.56 and 1,335.42 is: 1,987.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.26 : 2,064.56 = 1,335.42 : x
  2. Step 2: Convert to fraction form
    1,387.26/2,064.56 = 1,335.42/x
  3. Step 3: Cross multiply
    1,387.26x = 2,064.56 × 1,335.42
  4. Step 4: Simplify right side
    1,387.26x = 2,757,048.04
  5. Step 5: Solve for x
    x = 2,757,048.04/1,387.26
  6. Step 6: Final answer
    x = 1,987.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.