Home / 1,212.17-1,818.42-1,207.72

Finding the Fourth Proportional to 1,212.17, 1,818.42 and 1,207.72

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Solution

The fourth proportional to 1,212.17, 1,818.42 and 1,207.72 is: 1,811.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.17 : 1,818.42 = 1,207.72 : x
  2. Step 2: Convert to fraction form
    1,212.17/1,818.42 = 1,207.72/x
  3. Step 3: Cross multiply
    1,212.17x = 1,818.42 × 1,207.72
  4. Step 4: Simplify right side
    1,212.17x = 2,196,142.20
  5. Step 5: Solve for x
    x = 2,196,142.20/1,212.17
  6. Step 6: Final answer
    x = 1,811.74

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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.