Home / 2,212.39-3,318.81-631.12

Finding the Fourth Proportional to 2,212.39, 3,318.81 and 631.12

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Solution

The fourth proportional to 2,212.39, 3,318.81 and 631.12 is: 946.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.39 : 3,318.81 = 631.12 : x
  2. Step 2: Convert to fraction form
    2,212.39/3,318.81 = 631.12/x
  3. Step 3: Cross multiply
    2,212.39x = 3,318.81 × 631.12
  4. Step 4: Simplify right side
    2,212.39x = 2,094,567.37
  5. Step 5: Solve for x
    x = 2,094,567.37/2,212.39
  6. Step 6: Final answer
    x = 946.74

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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.