Home / 3,117.84-4,679.69-2,078.57

Finding the Fourth Proportional to 3,117.84, 4,679.69 and 2,078.57

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Solution

The fourth proportional to 3,117.84, 4,679.69 and 2,078.57 is: 3,119.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.84 : 4,679.69 = 2,078.57 : x
  2. Step 2: Convert to fraction form
    3,117.84/4,679.69 = 2,078.57/x
  3. Step 3: Cross multiply
    3,117.84x = 4,679.69 × 2,078.57
  4. Step 4: Simplify right side
    3,117.84x = 9,727,029.45
  5. Step 5: Solve for x
    x = 9,727,029.45/3,117.84
  6. Step 6: Final answer
    x = 3,119.80

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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.