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Finding the Fourth Proportional to 2,752.80, 4,129.40 and 805.06

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Solution

The fourth proportional to 2,752.80, 4,129.40 and 805.06 is: 1,207.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,752.80 : 4,129.40 = 805.06 : x
  2. Step 2: Convert to fraction form
    2,752.80/4,129.40 = 805.06/x
  3. Step 3: Cross multiply
    2,752.80x = 4,129.40 × 805.06
  4. Step 4: Simplify right side
    2,752.80x = 3,324,414.76
  5. Step 5: Solve for x
    x = 3,324,414.76/2,752.80
  6. Step 6: Final answer
    x = 1,207.65

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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.