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Finding the Fourth Proportional to 716.39, 988.26 and 451.16

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Solution

The fourth proportional to 716.39, 988.26 and 451.16 is: 622.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.39 : 988.26 = 451.16 : x
  2. Step 2: Convert to fraction form
    716.39/988.26 = 451.16/x
  3. Step 3: Cross multiply
    716.39x = 988.26 × 451.16
  4. Step 4: Simplify right side
    716.39x = 445,858.44
  5. Step 5: Solve for x
    x = 445,858.44/716.39
  6. Step 6: Final answer
    x = 622.37

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Half scale
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Double scale
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1.5x scale

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.