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Finding the Fourth Proportional to 717.21, 989.76 and 414.44

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Solution

The fourth proportional to 717.21, 989.76 and 414.44 is: 571.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.21 : 989.76 = 414.44 : x
  2. Step 2: Convert to fraction form
    717.21/989.76 = 414.44/x
  3. Step 3: Cross multiply
    717.21x = 989.76 × 414.44
  4. Step 4: Simplify right side
    717.21x = 410,196.13
  5. Step 5: Solve for x
    x = 410,196.13/717.21
  6. Step 6: Final answer
    x = 571.93

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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.