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Finding the Fourth Proportional to 716.55, 1,074.14 and 305.12

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Solution

The fourth proportional to 716.55, 1,074.14 and 305.12 is: 457.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.55 : 1,074.14 = 305.12 : x
  2. Step 2: Convert to fraction form
    716.55/1,074.14 = 305.12/x
  3. Step 3: Cross multiply
    716.55x = 1,074.14 × 305.12
  4. Step 4: Simplify right side
    716.55x = 327,745.62
  5. Step 5: Solve for x
    x = 327,745.62/716.55
  6. Step 6: Final answer
    x = 457.39

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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.