Home / 1,317.12-1,813.20-1,150.80

Finding the Fourth Proportional to 1,317.12, 1,813.20 and 1,150.80

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Solution

The fourth proportional to 1,317.12, 1,813.20 and 1,150.80 is: 1,584.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.12 : 1,813.20 = 1,150.80 : x
  2. Step 2: Convert to fraction form
    1,317.12/1,813.20 = 1,150.80/x
  3. Step 3: Cross multiply
    1,317.12x = 1,813.20 × 1,150.80
  4. Step 4: Simplify right side
    1,317.12x = 2,086,630.56
  5. Step 5: Solve for x
    x = 2,086,630.56/1,317.12
  6. Step 6: Final answer
    x = 1,584.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.