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Finding the Fourth Proportional to 2,869.75, 4,305.35 and 817.75

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Solution

The fourth proportional to 2,869.75, 4,305.35 and 817.75 is: 1,226.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.75 : 4,305.35 = 817.75 : x
  2. Step 2: Convert to fraction form
    2,869.75/4,305.35 = 817.75/x
  3. Step 3: Cross multiply
    2,869.75x = 4,305.35 × 817.75
  4. Step 4: Simplify right side
    2,869.75x = 3,520,699.96
  5. Step 5: Solve for x
    x = 3,520,699.96/2,869.75
  6. Step 6: Final answer
    x = 1,226.83

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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.