Home / 4,331.40-6,492-1,990.80

Finding the Fourth Proportional to 4,331.40, 6,492 and 1,990.80

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Solution

The fourth proportional to 4,331.40, 6,492 and 1,990.80 is: 2,983.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,331.40 : 6,492 = 1,990.80 : x
  2. Step 2: Convert to fraction form
    4,331.40/6,492 = 1,990.80/x
  3. Step 3: Cross multiply
    4,331.40x = 6,492 × 1,990.80
  4. Step 4: Simplify right side
    4,331.40x = 12,924,273.60
  5. Step 5: Solve for x
    x = 12,924,273.60/4,331.40
  6. Step 6: Final answer
    x = 2,983.86

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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.