Home / 1,489.23-2,223.82-1,215.86

Finding the Fourth Proportional to 1,489.23, 2,223.82 and 1,215.86

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Solution

The fourth proportional to 1,489.23, 2,223.82 and 1,215.86 is: 1,815.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.23 : 2,223.82 = 1,215.86 : x
  2. Step 2: Convert to fraction form
    1,489.23/2,223.82 = 1,215.86/x
  3. Step 3: Cross multiply
    1,489.23x = 2,223.82 × 1,215.86
  4. Step 4: Simplify right side
    1,489.23x = 2,703,851.27
  5. Step 5: Solve for x
    x = 2,703,851.27/1,489.23
  6. Step 6: Final answer
    x = 1,815.60

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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.