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Finding the Fourth Proportional to 717.69, 995.44 and 688.53

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Solution

The fourth proportional to 717.69, 995.44 and 688.53 is: 954.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.69 : 995.44 = 688.53 : x
  2. Step 2: Convert to fraction form
    717.69/995.44 = 688.53/x
  3. Step 3: Cross multiply
    717.69x = 995.44 × 688.53
  4. Step 4: Simplify right side
    717.69x = 685,390.30
  5. Step 5: Solve for x
    x = 685,390.30/717.69
  6. Step 6: Final answer
    x = 954.99

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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.