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Finding the Fourth Proportional to 518.08, 777.54 and 355.96

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Solution

The fourth proportional to 518.08, 777.54 and 355.96 is: 534.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.08 : 777.54 = 355.96 : x
  2. Step 2: Convert to fraction form
    518.08/777.54 = 355.96/x
  3. Step 3: Cross multiply
    518.08x = 777.54 × 355.96
  4. Step 4: Simplify right side
    518.08x = 276,773.14
  5. Step 5: Solve for x
    x = 276,773.14/518.08
  6. Step 6: Final answer
    x = 534.23

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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.