Home / 1,449.80-1,996.08-1,228.40

Finding the Fourth Proportional to 1,449.80, 1,996.08 and 1,228.40

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Solution

The fourth proportional to 1,449.80, 1,996.08 and 1,228.40 is: 1,691.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.80 : 1,996.08 = 1,228.40 : x
  2. Step 2: Convert to fraction form
    1,449.80/1,996.08 = 1,228.40/x
  3. Step 3: Cross multiply
    1,449.80x = 1,996.08 × 1,228.40
  4. Step 4: Simplify right side
    1,449.80x = 2,451,984.67
  5. Step 5: Solve for x
    x = 2,451,984.67/1,449.80
  6. Step 6: Final answer
    x = 1,691.26

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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.