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Finding the Fourth Proportional to 518.59, 777.06 and 403.30

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Solution

The fourth proportional to 518.59, 777.06 and 403.30 is: 604.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.59 : 777.06 = 403.30 : x
  2. Step 2: Convert to fraction form
    518.59/777.06 = 403.30/x
  3. Step 3: Cross multiply
    518.59x = 777.06 × 403.30
  4. Step 4: Simplify right side
    518.59x = 313,388.30
  5. Step 5: Solve for x
    x = 313,388.30/518.59
  6. Step 6: Final answer
    x = 604.31

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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.