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Finding the Fourth Proportional to 523.89, 786.15 and 215.69

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Solution

The fourth proportional to 523.89, 786.15 and 215.69 is: 323.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.89 : 786.15 = 215.69 : x
  2. Step 2: Convert to fraction form
    523.89/786.15 = 215.69/x
  3. Step 3: Cross multiply
    523.89x = 786.15 × 215.69
  4. Step 4: Simplify right side
    523.89x = 169,560.76
  5. Step 5: Solve for x
    x = 169,560.76/523.89
  6. Step 6: Final answer
    x = 323.66

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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.