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Finding the Fourth Proportional to 2,146.56, 3,216.96 and 847.68

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Solution

The fourth proportional to 2,146.56, 3,216.96 and 847.68 is: 1,270.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,146.56 : 3,216.96 = 847.68 : x
  2. Step 2: Convert to fraction form
    2,146.56/3,216.96 = 847.68/x
  3. Step 3: Cross multiply
    2,146.56x = 3,216.96 × 847.68
  4. Step 4: Simplify right side
    2,146.56x = 2,726,952.65
  5. Step 5: Solve for x
    x = 2,726,952.65/2,146.56
  6. Step 6: Final answer
    x = 1,270.38

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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.