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Finding the Fourth Proportional to 518.04, 777.60 and 422.28

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Solution

The fourth proportional to 518.04, 777.60 and 422.28 is: 633.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.04 : 777.60 = 422.28 : x
  2. Step 2: Convert to fraction form
    518.04/777.60 = 422.28/x
  3. Step 3: Cross multiply
    518.04x = 777.60 × 422.28
  4. Step 4: Simplify right side
    518.04x = 328,364.93
  5. Step 5: Solve for x
    x = 328,364.93/518.04
  6. Step 6: Final answer
    x = 633.86

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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.