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Finding the Fourth Proportional to 850.54, 1,173.95 and 519.15

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Solution

The fourth proportional to 850.54, 1,173.95 and 519.15 is: 716.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.54 : 1,173.95 = 519.15 : x
  2. Step 2: Convert to fraction form
    850.54/1,173.95 = 519.15/x
  3. Step 3: Cross multiply
    850.54x = 1,173.95 × 519.15
  4. Step 4: Simplify right side
    850.54x = 609,456.14
  5. Step 5: Solve for x
    x = 609,456.14/850.54
  6. Step 6: Final answer
    x = 716.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.