Home / 1,212.18-1,818.28-969.18

Finding the Fourth Proportional to 1,212.18, 1,818.28 and 969.18

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Solution

The fourth proportional to 1,212.18, 1,818.28 and 969.18 is: 1,453.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.18 : 1,818.28 = 969.18 : x
  2. Step 2: Convert to fraction form
    1,212.18/1,818.28 = 969.18/x
  3. Step 3: Cross multiply
    1,212.18x = 1,818.28 × 969.18
  4. Step 4: Simplify right side
    1,212.18x = 1,762,240.61
  5. Step 5: Solve for x
    x = 1,762,240.61/1,212.18
  6. Step 6: Final answer
    x = 1,453.78

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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.