Home / 2,986.40-4,117.20-2,519.84

Finding the Fourth Proportional to 2,986.40, 4,117.20 and 2,519.84

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Solution

The fourth proportional to 2,986.40, 4,117.20 and 2,519.84 is: 3,473.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.40 : 4,117.20 = 2,519.84 : x
  2. Step 2: Convert to fraction form
    2,986.40/4,117.20 = 2,519.84/x
  3. Step 3: Cross multiply
    2,986.40x = 4,117.20 × 2,519.84
  4. Step 4: Simplify right side
    2,986.40x = 10,374,685.25
  5. Step 5: Solve for x
    x = 10,374,685.25/2,986.40
  6. Step 6: Final answer
    x = 3,473.98

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1.5x scale

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.