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Finding the Fourth Proportional to 634.99, 951.84 and 429.58

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Solution

The fourth proportional to 634.99, 951.84 and 429.58 is: 643.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.99 : 951.84 = 429.58 : x
  2. Step 2: Convert to fraction form
    634.99/951.84 = 429.58/x
  3. Step 3: Cross multiply
    634.99x = 951.84 × 429.58
  4. Step 4: Simplify right side
    634.99x = 408,889.82
  5. Step 5: Solve for x
    x = 408,889.82/634.99
  6. Step 6: Final answer
    x = 643.93

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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.