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Finding the Fourth Proportional to 523.77, 785.88 and 215.55

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Solution

The fourth proportional to 523.77, 785.88 and 215.55 is: 323.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.77 : 785.88 = 215.55 : x
  2. Step 2: Convert to fraction form
    523.77/785.88 = 215.55/x
  3. Step 3: Cross multiply
    523.77x = 785.88 × 215.55
  4. Step 4: Simplify right side
    523.77x = 169,396.43
  5. Step 5: Solve for x
    x = 169,396.43/523.77
  6. Step 6: Final answer
    x = 323.42

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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.