Home / 3,431.50-5,148.70-1,678.05

Finding the Fourth Proportional to 3,431.50, 5,148.70 and 1,678.05

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Solution

The fourth proportional to 3,431.50, 5,148.70 and 1,678.05 is: 2,517.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.50 : 5,148.70 = 1,678.05 : x
  2. Step 2: Convert to fraction form
    3,431.50/5,148.70 = 1,678.05/x
  3. Step 3: Cross multiply
    3,431.50x = 5,148.70 × 1,678.05
  4. Step 4: Simplify right side
    3,431.50x = 8,639,771.84
  5. Step 5: Solve for x
    x = 8,639,771.84/3,431.50
  6. Step 6: Final answer
    x = 2,517.78

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Double scale
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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.