Home / 1,321.04-1,981.60-1,104.80

Finding the Fourth Proportional to 1,321.04, 1,981.60 and 1,104.80

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Solution

The fourth proportional to 1,321.04, 1,981.60 and 1,104.80 is: 1,657.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.04 : 1,981.60 = 1,104.80 : x
  2. Step 2: Convert to fraction form
    1,321.04/1,981.60 = 1,104.80/x
  3. Step 3: Cross multiply
    1,321.04x = 1,981.60 × 1,104.80
  4. Step 4: Simplify right side
    1,321.04x = 2,189,271.68
  5. Step 5: Solve for x
    x = 2,189,271.68/1,321.04
  6. Step 6: Final answer
    x = 1,657.23

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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.