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Finding the Fourth Proportional to 2,872.56, 4,309.56 and 924.96

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Solution

The fourth proportional to 2,872.56, 4,309.56 and 924.96 is: 1,387.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.56 : 4,309.56 = 924.96 : x
  2. Step 2: Convert to fraction form
    2,872.56/4,309.56 = 924.96/x
  3. Step 3: Cross multiply
    2,872.56x = 4,309.56 × 924.96
  4. Step 4: Simplify right side
    2,872.56x = 3,986,170.62
  5. Step 5: Solve for x
    x = 3,986,170.62/2,872.56
  6. Step 6: Final answer
    x = 1,387.67

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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.