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Finding the Fourth Proportional to 717.69, 989.82 and 468.82

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Solution

The fourth proportional to 717.69, 989.82 and 468.82 is: 646.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.69 : 989.82 = 468.82 : x
  2. Step 2: Convert to fraction form
    717.69/989.82 = 468.82/x
  3. Step 3: Cross multiply
    717.69x = 989.82 × 468.82
  4. Step 4: Simplify right side
    717.69x = 464,047.41
  5. Step 5: Solve for x
    x = 464,047.41/717.69
  6. Step 6: Final answer
    x = 646.58

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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.