Home / 1,742.12-2,611.20-816.80

Finding the Fourth Proportional to 1,742.12, 2,611.20 and 816.80

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Solution

The fourth proportional to 1,742.12, 2,611.20 and 816.80 is: 1,224.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,742.12 : 2,611.20 = 816.80 : x
  2. Step 2: Convert to fraction form
    1,742.12/2,611.20 = 816.80/x
  3. Step 3: Cross multiply
    1,742.12x = 2,611.20 × 816.80
  4. Step 4: Simplify right side
    1,742.12x = 2,132,828.16
  5. Step 5: Solve for x
    x = 2,132,828.16/1,742.12
  6. Step 6: Final answer
    x = 1,224.27

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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.