Home / 1,315.23-1,812.36-1,222.97

Finding the Fourth Proportional to 1,315.23, 1,812.36 and 1,222.97

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Solution

The fourth proportional to 1,315.23, 1,812.36 and 1,222.97 is: 1,685.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.23 : 1,812.36 = 1,222.97 : x
  2. Step 2: Convert to fraction form
    1,315.23/1,812.36 = 1,222.97/x
  3. Step 3: Cross multiply
    1,315.23x = 1,812.36 × 1,222.97
  4. Step 4: Simplify right side
    1,315.23x = 2,216,452.85
  5. Step 5: Solve for x
    x = 2,216,452.85/1,315.23
  6. Step 6: Final answer
    x = 1,685.22

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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.