Home / 4,212.12-6,318.16-1,290.48

Finding the Fourth Proportional to 4,212.12, 6,318.16 and 1,290.48

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Solution

The fourth proportional to 4,212.12, 6,318.16 and 1,290.48 is: 1,935.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,212.12 : 6,318.16 = 1,290.48 : x
  2. Step 2: Convert to fraction form
    4,212.12/6,318.16 = 1,290.48/x
  3. Step 3: Cross multiply
    4,212.12x = 6,318.16 × 1,290.48
  4. Step 4: Simplify right side
    4,212.12x = 8,153,459.12
  5. Step 5: Solve for x
    x = 8,153,459.12/4,212.12
  6. Step 6: Final answer
    x = 1,935.71

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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.