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Finding the Fourth Proportional to 2,151.38, 3,227.60 and 612.38

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Solution

The fourth proportional to 2,151.38, 3,227.60 and 612.38 is: 918.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.38 : 3,227.60 = 612.38 : x
  2. Step 2: Convert to fraction form
    2,151.38/3,227.60 = 612.38/x
  3. Step 3: Cross multiply
    2,151.38x = 3,227.60 × 612.38
  4. Step 4: Simplify right side
    2,151.38x = 1,976,503.08
  5. Step 5: Solve for x
    x = 1,976,503.08/2,151.38
  6. Step 6: Final answer
    x = 918.72

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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.