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Finding the Fourth Proportional to 2,663.41, 3,994.66 and 715.16

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Solution

The fourth proportional to 2,663.41, 3,994.66 and 715.16 is: 1,072.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,663.41 : 3,994.66 = 715.16 : x
  2. Step 2: Convert to fraction form
    2,663.41/3,994.66 = 715.16/x
  3. Step 3: Cross multiply
    2,663.41x = 3,994.66 × 715.16
  4. Step 4: Simplify right side
    2,663.41x = 2,856,797.50
  5. Step 5: Solve for x
    x = 2,856,797.50/2,663.41
  6. Step 6: Final answer
    x = 1,072.61

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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.