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Finding the Fourth Proportional to 2,576.72, 3,865.08 and 628.92

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Solution

The fourth proportional to 2,576.72, 3,865.08 and 628.92 is: 943.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,576.72 : 3,865.08 = 628.92 : x
  2. Step 2: Convert to fraction form
    2,576.72/3,865.08 = 628.92/x
  3. Step 3: Cross multiply
    2,576.72x = 3,865.08 × 628.92
  4. Step 4: Simplify right side
    2,576.72x = 2,430,826.11
  5. Step 5: Solve for x
    x = 2,430,826.11/2,576.72
  6. Step 6: Final answer
    x = 943.38

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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.