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Finding the Fourth Proportional to 717.36, 990.36 and 673.44

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Solution

The fourth proportional to 717.36, 990.36 and 673.44 is: 929.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.36 : 990.36 = 673.44 : x
  2. Step 2: Convert to fraction form
    717.36/990.36 = 673.44/x
  3. Step 3: Cross multiply
    717.36x = 990.36 × 673.44
  4. Step 4: Simplify right side
    717.36x = 666,948.04
  5. Step 5: Solve for x
    x = 666,948.04/717.36
  6. Step 6: Final answer
    x = 929.73

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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.