Home / 2,112.19-3,167.67-631.35

Finding the Fourth Proportional to 2,112.19, 3,167.67 and 631.35

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Solution

The fourth proportional to 2,112.19, 3,167.67 and 631.35 is: 946.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.19 : 3,167.67 = 631.35 : x
  2. Step 2: Convert to fraction form
    2,112.19/3,167.67 = 631.35/x
  3. Step 3: Cross multiply
    2,112.19x = 3,167.67 × 631.35
  4. Step 4: Simplify right side
    2,112.19x = 1,999,908.45
  5. Step 5: Solve for x
    x = 1,999,908.45/2,112.19
  6. Step 6: Final answer
    x = 946.84

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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.