Home / 4,212.49-6,318.75-1,290.79

Finding the Fourth Proportional to 4,212.49, 6,318.75 and 1,290.79

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Solution

The fourth proportional to 4,212.49, 6,318.75 and 1,290.79 is: 1,936.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,212.49 : 6,318.75 = 1,290.79 : x
  2. Step 2: Convert to fraction form
    4,212.49/6,318.75 = 1,290.79/x
  3. Step 3: Cross multiply
    4,212.49x = 6,318.75 × 1,290.79
  4. Step 4: Simplify right side
    4,212.49x = 8,156,179.31
  5. Step 5: Solve for x
    x = 8,156,179.31/4,212.49
  6. Step 6: Final answer
    x = 1,936.19

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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.