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Finding the Fourth Proportional to 717.15, 1,076.13 and 306.24

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Solution

The fourth proportional to 717.15, 1,076.13 and 306.24 is: 459.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.15 : 1,076.13 = 306.24 : x
  2. Step 2: Convert to fraction form
    717.15/1,076.13 = 306.24/x
  3. Step 3: Cross multiply
    717.15x = 1,076.13 × 306.24
  4. Step 4: Simplify right side
    717.15x = 329,548.67
  5. Step 5: Solve for x
    x = 329,548.67/717.15
  6. Step 6: Final answer
    x = 459.53

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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.