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Finding the Fourth Proportional to 518.23, 781.23 and 483.86

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Solution

The fourth proportional to 518.23, 781.23 and 483.86 is: 729.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.23 : 781.23 = 483.86 : x
  2. Step 2: Convert to fraction form
    518.23/781.23 = 483.86/x
  3. Step 3: Cross multiply
    518.23x = 781.23 × 483.86
  4. Step 4: Simplify right side
    518.23x = 378,002.60
  5. Step 5: Solve for x
    x = 378,002.60/518.23
  6. Step 6: Final answer
    x = 729.41

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.