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Finding the Fourth Proportional to 3,117.96, 4,676.90 and 809.46

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Solution

The fourth proportional to 3,117.96, 4,676.90 and 809.46 is: 1,214.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.96 : 4,676.90 = 809.46 : x
  2. Step 2: Convert to fraction form
    3,117.96/4,676.90 = 809.46/x
  3. Step 3: Cross multiply
    3,117.96x = 4,676.90 × 809.46
  4. Step 4: Simplify right side
    3,117.96x = 3,785,759.43
  5. Step 5: Solve for x
    x = 3,785,759.43/3,117.96
  6. Step 6: Final answer
    x = 1,214.18

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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.