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Finding the Fourth Proportional to 3,205.49, 4,808.52 and 865.85

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Solution

The fourth proportional to 3,205.49, 4,808.52 and 865.85 is: 1,298.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,205.49 : 4,808.52 = 865.85 : x
  2. Step 2: Convert to fraction form
    3,205.49/4,808.52 = 865.85/x
  3. Step 3: Cross multiply
    3,205.49x = 4,808.52 × 865.85
  4. Step 4: Simplify right side
    3,205.49x = 4,163,457.04
  5. Step 5: Solve for x
    x = 4,163,457.04/3,205.49
  6. Step 6: Final answer
    x = 1,298.85

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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.