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Finding the Fourth Proportional to 1,447.92, 2,171.64 and 523.30

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Solution

The fourth proportional to 1,447.92, 2,171.64 and 523.30 is: 784.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.92 : 2,171.64 = 523.30 : x
  2. Step 2: Convert to fraction form
    1,447.92/2,171.64 = 523.30/x
  3. Step 3: Cross multiply
    1,447.92x = 2,171.64 × 523.30
  4. Step 4: Simplify right side
    1,447.92x = 1,136,419.21
  5. Step 5: Solve for x
    x = 1,136,419.21/1,447.92
  6. Step 6: Final answer
    x = 784.86

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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.