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Finding the Fourth Proportional to 716.12, 988.19 and 401.36

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Solution

The fourth proportional to 716.12, 988.19 and 401.36 is: 553.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.12 : 988.19 = 401.36 : x
  2. Step 2: Convert to fraction form
    716.12/988.19 = 401.36/x
  3. Step 3: Cross multiply
    716.12x = 988.19 × 401.36
  4. Step 4: Simplify right side
    716.12x = 396,619.94
  5. Step 5: Solve for x
    x = 396,619.94/716.12
  6. Step 6: Final answer
    x = 553.85

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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.