Home / 2,989.74-4,125.94-1,645.40

Finding the Fourth Proportional to 2,989.74, 4,125.94 and 1,645.40

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Solution

The fourth proportional to 2,989.74, 4,125.94 and 1,645.40 is: 2,270.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.74 : 4,125.94 = 1,645.40 : x
  2. Step 2: Convert to fraction form
    2,989.74/4,125.94 = 1,645.40/x
  3. Step 3: Cross multiply
    2,989.74x = 4,125.94 × 1,645.40
  4. Step 4: Simplify right side
    2,989.74x = 6,788,821.68
  5. Step 5: Solve for x
    x = 6,788,821.68/2,989.74
  6. Step 6: Final answer
    x = 2,270.71

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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.