Home / 1,321.75-1,982.90-552.25

Finding the Fourth Proportional to 1,321.75, 1,982.90 and 552.25

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Solution

The fourth proportional to 1,321.75, 1,982.90 and 552.25 is: 828.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.75 : 1,982.90 = 552.25 : x
  2. Step 2: Convert to fraction form
    1,321.75/1,982.90 = 552.25/x
  3. Step 3: Cross multiply
    1,321.75x = 1,982.90 × 552.25
  4. Step 4: Simplify right side
    1,321.75x = 1,095,056.53
  5. Step 5: Solve for x
    x = 1,095,056.53/1,321.75
  6. Step 6: Final answer
    x = 828.49

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1.5x scale

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.