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Finding the Fourth Proportional to 3,146.51, 4,719.74 and 806.51

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Solution

The fourth proportional to 3,146.51, 4,719.74 and 806.51 is: 1,209.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,146.51 : 4,719.74 = 806.51 : x
  2. Step 2: Convert to fraction form
    3,146.51/4,719.74 = 806.51/x
  3. Step 3: Cross multiply
    3,146.51x = 4,719.74 × 806.51
  4. Step 4: Simplify right side
    3,146.51x = 3,806,493.91
  5. Step 5: Solve for x
    x = 3,806,493.91/3,146.51
  6. Step 6: Final answer
    x = 1,209.75

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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.