Home / 1,217.80-1,829.40-1,168.60

Finding the Fourth Proportional to 1,217.80, 1,829.40 and 1,168.60

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Solution

The fourth proportional to 1,217.80, 1,829.40 and 1,168.60 is: 1,755.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.80 : 1,829.40 = 1,168.60 : x
  2. Step 2: Convert to fraction form
    1,217.80/1,829.40 = 1,168.60/x
  3. Step 3: Cross multiply
    1,217.80x = 1,829.40 × 1,168.60
  4. Step 4: Simplify right side
    1,217.80x = 2,137,836.84
  5. Step 5: Solve for x
    x = 2,137,836.84/1,217.80
  6. Step 6: Final answer
    x = 1,755.49

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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.