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Finding the Fourth Proportional to 2,112.48, 3,168.97 and 651.75

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Solution

The fourth proportional to 2,112.48, 3,168.97 and 651.75 is: 977.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.48 : 3,168.97 = 651.75 : x
  2. Step 2: Convert to fraction form
    2,112.48/3,168.97 = 651.75/x
  3. Step 3: Cross multiply
    2,112.48x = 3,168.97 × 651.75
  4. Step 4: Simplify right side
    2,112.48x = 2,065,366.35
  5. Step 5: Solve for x
    x = 2,065,366.35/2,112.48
  6. Step 6: Final answer
    x = 977.70

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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.