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Finding the Fourth Proportional to 634.05, 951.21 and 345.42

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Solution

The fourth proportional to 634.05, 951.21 and 345.42 is: 518.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.05 : 951.21 = 345.42 : x
  2. Step 2: Convert to fraction form
    634.05/951.21 = 345.42/x
  3. Step 3: Cross multiply
    634.05x = 951.21 × 345.42
  4. Step 4: Simplify right side
    634.05x = 328,566.96
  5. Step 5: Solve for x
    x = 328,566.96/634.05
  6. Step 6: Final answer
    x = 518.20

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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.