Home / 2,628.35-3,939-1,394.45

Finding the Fourth Proportional to 2,628.35, 3,939 and 1,394.45

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Solution

The fourth proportional to 2,628.35, 3,939 and 1,394.45 is: 2,089.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.35 : 3,939 = 1,394.45 : x
  2. Step 2: Convert to fraction form
    2,628.35/3,939 = 1,394.45/x
  3. Step 3: Cross multiply
    2,628.35x = 3,939 × 1,394.45
  4. Step 4: Simplify right side
    2,628.35x = 5,492,718.86
  5. Step 5: Solve for x
    x = 5,492,718.86/2,628.35
  6. Step 6: Final answer
    x = 2,089.80

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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.