Home / 1,217.40-1,829.70-1,195.80

Finding the Fourth Proportional to 1,217.40, 1,829.70 and 1,195.80

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Solution

The fourth proportional to 1,217.40, 1,829.70 and 1,195.80 is: 1,797.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.40 : 1,829.70 = 1,195.80 : x
  2. Step 2: Convert to fraction form
    1,217.40/1,829.70 = 1,195.80/x
  3. Step 3: Cross multiply
    1,217.40x = 1,829.70 × 1,195.80
  4. Step 4: Simplify right side
    1,217.40x = 2,187,955.26
  5. Step 5: Solve for x
    x = 2,187,955.26/1,217.40
  6. Step 6: Final answer
    x = 1,797.24

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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.