Home / 1,630.60-2,440.30-981.80

Finding the Fourth Proportional to 1,630.60, 2,440.30 and 981.80

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Solution

The fourth proportional to 1,630.60, 2,440.30 and 981.80 is: 1,469.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,630.60 : 2,440.30 = 981.80 : x
  2. Step 2: Convert to fraction form
    1,630.60/2,440.30 = 981.80/x
  3. Step 3: Cross multiply
    1,630.60x = 2,440.30 × 981.80
  4. Step 4: Simplify right side
    1,630.60x = 2,395,886.54
  5. Step 5: Solve for x
    x = 2,395,886.54/1,630.60
  6. Step 6: Final answer
    x = 1,469.33

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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.