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Finding the Fourth Proportional to 716.44, 993.70 and 687.28

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Solution

The fourth proportional to 716.44, 993.70 and 687.28 is: 953.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.44 : 993.70 = 687.28 : x
  2. Step 2: Convert to fraction form
    716.44/993.70 = 687.28/x
  3. Step 3: Cross multiply
    716.44x = 993.70 × 687.28
  4. Step 4: Simplify right side
    716.44x = 682,945.17
  5. Step 5: Solve for x
    x = 682,945.17/716.44
  6. Step 6: Final answer
    x = 953.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.