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Finding the Fourth Proportional to 518.15, 777.22 and 492.20

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Solution

The fourth proportional to 518.15, 777.22 and 492.20 is: 738.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.15 : 777.22 = 492.20 : x
  2. Step 2: Convert to fraction form
    518.15/777.22 = 492.20/x
  3. Step 3: Cross multiply
    518.15x = 777.22 × 492.20
  4. Step 4: Simplify right side
    518.15x = 382,541.34
  5. Step 5: Solve for x
    x = 382,541.34/518.15
  6. Step 6: Final answer
    x = 738.29

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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.