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Finding the Fourth Proportional to 2,112.41, 3,168.01 and 813.58

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Solution

The fourth proportional to 2,112.41, 3,168.01 and 813.58 is: 1,220.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.41 : 3,168.01 = 813.58 : x
  2. Step 2: Convert to fraction form
    2,112.41/3,168.01 = 813.58/x
  3. Step 3: Cross multiply
    2,112.41x = 3,168.01 × 813.58
  4. Step 4: Simplify right side
    2,112.41x = 2,577,422.67
  5. Step 5: Solve for x
    x = 2,577,422.67/2,112.41
  6. Step 6: Final answer
    x = 1,220.13

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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.