Home / 4,220.79-6,331.27-1,299.09

Finding the Fourth Proportional to 4,220.79, 6,331.27 and 1,299.09

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Solution

The fourth proportional to 4,220.79, 6,331.27 and 1,299.09 is: 1,948.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,220.79 : 6,331.27 = 1,299.09 : x
  2. Step 2: Convert to fraction form
    4,220.79/6,331.27 = 1,299.09/x
  3. Step 3: Cross multiply
    4,220.79x = 6,331.27 × 1,299.09
  4. Step 4: Simplify right side
    4,220.79x = 8,224,912.47
  5. Step 5: Solve for x
    x = 8,224,912.47/4,220.79
  6. Step 6: Final answer
    x = 1,948.67

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Half scale
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Double scale
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Similar ratio
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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.