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Finding the Fourth Proportional to 523.09, 784.82 and 215.12

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Solution

The fourth proportional to 523.09, 784.82 and 215.12 is: 322.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.09 : 784.82 = 215.12 : x
  2. Step 2: Convert to fraction form
    523.09/784.82 = 215.12/x
  3. Step 3: Cross multiply
    523.09x = 784.82 × 215.12
  4. Step 4: Simplify right side
    523.09x = 168,832.98
  5. Step 5: Solve for x
    x = 168,832.98/523.09
  6. Step 6: Final answer
    x = 322.76

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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.