Home / 3,210.75-4,431.20-1,813.59

Finding the Fourth Proportional to 3,210.75, 4,431.20 and 1,813.59

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Solution

The fourth proportional to 3,210.75, 4,431.20 and 1,813.59 is: 2,502.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,210.75 : 4,431.20 = 1,813.59 : x
  2. Step 2: Convert to fraction form
    3,210.75/4,431.20 = 1,813.59/x
  3. Step 3: Cross multiply
    3,210.75x = 4,431.20 × 1,813.59
  4. Step 4: Simplify right side
    3,210.75x = 8,036,370.94
  5. Step 5: Solve for x
    x = 8,036,370.94/3,210.75
  6. Step 6: Final answer
    x = 2,502.96

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.