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Finding the Fourth Proportional to 2,754.77, 4,128.50 and 1,290.85

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Solution

The fourth proportional to 2,754.77, 4,128.50 and 1,290.85 is: 1,934.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,754.77 : 4,128.50 = 1,290.85 : x
  2. Step 2: Convert to fraction form
    2,754.77/4,128.50 = 1,290.85/x
  3. Step 3: Cross multiply
    2,754.77x = 4,128.50 × 1,290.85
  4. Step 4: Simplify right side
    2,754.77x = 5,329,247.13
  5. Step 5: Solve for x
    x = 5,329,247.13/2,754.77
  6. Step 6: Final answer
    x = 1,934.55

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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.