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Finding the Fourth Proportional to 795.22, 1,191.62 and 505.78

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Solution

The fourth proportional to 795.22, 1,191.62 and 505.78 is: 757.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.22 : 1,191.62 = 505.78 : x
  2. Step 2: Convert to fraction form
    795.22/1,191.62 = 505.78/x
  3. Step 3: Cross multiply
    795.22x = 1,191.62 × 505.78
  4. Step 4: Simplify right side
    795.22x = 602,697.56
  5. Step 5: Solve for x
    x = 602,697.56/795.22
  6. Step 6: Final answer
    x = 757.90

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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.