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Finding the Fourth Proportional to 793.68, 1,191.74 and 307.68

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Solution

The fourth proportional to 793.68, 1,191.74 and 307.68 is: 461.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.68 : 1,191.74 = 307.68 : x
  2. Step 2: Convert to fraction form
    793.68/1,191.74 = 307.68/x
  3. Step 3: Cross multiply
    793.68x = 1,191.74 × 307.68
  4. Step 4: Simplify right side
    793.68x = 366,673.02
  5. Step 5: Solve for x
    x = 366,673.02/793.68
  6. Step 6: Final answer
    x = 461.99

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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.