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Finding the Fourth Proportional to 795.38, 1,191.99 and 410.90

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Solution

The fourth proportional to 795.38, 1,191.99 and 410.90 is: 615.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.38 : 1,191.99 = 410.90 : x
  2. Step 2: Convert to fraction form
    795.38/1,191.99 = 410.90/x
  3. Step 3: Cross multiply
    795.38x = 1,191.99 × 410.90
  4. Step 4: Simplify right side
    795.38x = 489,788.69
  5. Step 5: Solve for x
    x = 489,788.69/795.38
  6. Step 6: Final answer
    x = 615.79

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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.