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Finding the Fourth Proportional to 716.36, 992.40 and 699.35

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Solution

The fourth proportional to 716.36, 992.40 and 699.35 is: 968.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.36 : 992.40 = 699.35 : x
  2. Step 2: Convert to fraction form
    716.36/992.40 = 699.35/x
  3. Step 3: Cross multiply
    716.36x = 992.40 × 699.35
  4. Step 4: Simplify right side
    716.36x = 694,029.98
  5. Step 5: Solve for x
    x = 694,029.98/716.36
  6. Step 6: Final answer
    x = 968.84

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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.