Home / 1,615.26-2,422.25-691.23

Finding the Fourth Proportional to 1,615.26, 2,422.25 and 691.23

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Solution

The fourth proportional to 1,615.26, 2,422.25 and 691.23 is: 1,036.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.26 : 2,422.25 = 691.23 : x
  2. Step 2: Convert to fraction form
    1,615.26/2,422.25 = 691.23/x
  3. Step 3: Cross multiply
    1,615.26x = 2,422.25 × 691.23
  4. Step 4: Simplify right side
    1,615.26x = 1,674,328.41
  5. Step 5: Solve for x
    x = 1,674,328.41/1,615.26
  6. Step 6: Final answer
    x = 1,036.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.