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Finding the Fourth Proportional to 3,151.92, 4,722.27 and 1,918.70

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Solution

The fourth proportional to 3,151.92, 4,722.27 and 1,918.70 is: 2,874.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,151.92 : 4,722.27 = 1,918.70 : x
  2. Step 2: Convert to fraction form
    3,151.92/4,722.27 = 1,918.70/x
  3. Step 3: Cross multiply
    3,151.92x = 4,722.27 × 1,918.70
  4. Step 4: Simplify right side
    3,151.92x = 9,060,606.35
  5. Step 5: Solve for x
    x = 9,060,606.35/3,151.92
  6. Step 6: Final answer
    x = 2,874.63

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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.