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Finding the Fourth Proportional to 518.03, 775.38 and 491.30

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Solution

The fourth proportional to 518.03, 775.38 and 491.30 is: 735.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.03 : 775.38 = 491.30 : x
  2. Step 2: Convert to fraction form
    518.03/775.38 = 491.30/x
  3. Step 3: Cross multiply
    518.03x = 775.38 × 491.30
  4. Step 4: Simplify right side
    518.03x = 380,944.19
  5. Step 5: Solve for x
    x = 380,944.19/518.03
  6. Step 6: Final answer
    x = 735.37

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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.