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Finding the Fourth Proportional to 2,151.63, 3,227.44 and 612.63

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Solution

The fourth proportional to 2,151.63, 3,227.44 and 612.63 is: 918.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.63 : 3,227.44 = 612.63 : x
  2. Step 2: Convert to fraction form
    2,151.63/3,227.44 = 612.63/x
  3. Step 3: Cross multiply
    2,151.63x = 3,227.44 × 612.63
  4. Step 4: Simplify right side
    2,151.63x = 1,977,226.57
  5. Step 5: Solve for x
    x = 1,977,226.57/2,151.63
  6. Step 6: Final answer
    x = 918.94

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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.