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Finding the Fourth Proportional to 523.48, 786.34 and 318.15

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Solution

The fourth proportional to 523.48, 786.34 and 318.15 is: 477.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.48 : 786.34 = 318.15 : x
  2. Step 2: Convert to fraction form
    523.48/786.34 = 318.15/x
  3. Step 3: Cross multiply
    523.48x = 786.34 × 318.15
  4. Step 4: Simplify right side
    523.48x = 250,174.07
  5. Step 5: Solve for x
    x = 250,174.07/523.48
  6. Step 6: Final answer
    x = 477.91

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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.