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Finding the Fourth Proportional to 2,748.32, 4,121.44 and 992.86

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Solution

The fourth proportional to 2,748.32, 4,121.44 and 992.86 is: 1,488.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,748.32 : 4,121.44 = 992.86 : x
  2. Step 2: Convert to fraction form
    2,748.32/4,121.44 = 992.86/x
  3. Step 3: Cross multiply
    2,748.32x = 4,121.44 × 992.86
  4. Step 4: Simplify right side
    2,748.32x = 4,092,012.92
  5. Step 5: Solve for x
    x = 4,092,012.92/2,748.32
  6. Step 6: Final answer
    x = 1,488.91

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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.