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Finding the Fourth Proportional to 716.55, 1,074.93 and 254.31

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Solution

The fourth proportional to 716.55, 1,074.93 and 254.31 is: 381.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.55 : 1,074.93 = 254.31 : x
  2. Step 2: Convert to fraction form
    716.55/1,074.93 = 254.31/x
  3. Step 3: Cross multiply
    716.55x = 1,074.93 × 254.31
  4. Step 4: Simplify right side
    716.55x = 273,365.45
  5. Step 5: Solve for x
    x = 273,365.45/716.55
  6. Step 6: Final answer
    x = 381.50

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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.