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Finding the Fourth Proportional to 523.74, 785.87 and 215.69

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Solution

The fourth proportional to 523.74, 785.87 and 215.69 is: 323.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.74 : 785.87 = 215.69 : x
  2. Step 2: Convert to fraction form
    523.74/785.87 = 215.69/x
  3. Step 3: Cross multiply
    523.74x = 785.87 × 215.69
  4. Step 4: Simplify right side
    523.74x = 169,504.30
  5. Step 5: Solve for x
    x = 169,504.30/523.74
  6. Step 6: Final answer
    x = 323.64

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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.