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Finding the Fourth Proportional to 717.93, 1,076.90 and 306.81

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Solution

The fourth proportional to 717.93, 1,076.90 and 306.81 is: 460.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.93 : 1,076.90 = 306.81 : x
  2. Step 2: Convert to fraction form
    717.93/1,076.90 = 306.81/x
  3. Step 3: Cross multiply
    717.93x = 1,076.90 × 306.81
  4. Step 4: Simplify right side
    717.93x = 330,403.69
  5. Step 5: Solve for x
    x = 330,403.69/717.93
  6. Step 6: Final answer
    x = 460.22

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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.