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Finding the Fourth Proportional to 716.36, 1,073.86 and 455.56

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Solution

The fourth proportional to 716.36, 1,073.86 and 455.56 is: 682.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.36 : 1,073.86 = 455.56 : x
  2. Step 2: Convert to fraction form
    716.36/1,073.86 = 455.56/x
  3. Step 3: Cross multiply
    716.36x = 1,073.86 × 455.56
  4. Step 4: Simplify right side
    716.36x = 489,203.84
  5. Step 5: Solve for x
    x = 489,203.84/716.36
  6. Step 6: Final answer
    x = 682.90

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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.