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Finding the Fourth Proportional to 423, 634.58 and 195

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Solution

The fourth proportional to 423, 634.58 and 195 is: 292.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    423 : 634.58 = 195 : x
  2. Step 2: Convert to fraction form
    423/634.58 = 195/x
  3. Step 3: Cross multiply
    423x = 634.58 × 195
  4. Step 4: Simplify right side
    423x = 123,743.10
  5. Step 5: Solve for x
    x = 123,743.10/423
  6. Step 6: Final answer
    x = 292.54

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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.