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Finding the Fourth Proportional to 518.02, 777.45 and 271.39

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Solution

The fourth proportional to 518.02, 777.45 and 271.39 is: 407.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.02 : 777.45 = 271.39 : x
  2. Step 2: Convert to fraction form
    518.02/777.45 = 271.39/x
  3. Step 3: Cross multiply
    518.02x = 777.45 × 271.39
  4. Step 4: Simplify right side
    518.02x = 210,992.16
  5. Step 5: Solve for x
    x = 210,992.16/518.02
  6. Step 6: Final answer
    x = 407.31

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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.