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Finding the Fourth Proportional to 789.74, 1,185.42 and 501.38

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Solution

The fourth proportional to 789.74, 1,185.42 and 501.38 is: 752.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.74 : 1,185.42 = 501.38 : x
  2. Step 2: Convert to fraction form
    789.74/1,185.42 = 501.38/x
  3. Step 3: Cross multiply
    789.74x = 1,185.42 × 501.38
  4. Step 4: Simplify right side
    789.74x = 594,339.95
  5. Step 5: Solve for x
    x = 594,339.95/789.74
  6. Step 6: Final answer
    x = 752.58

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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.