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Finding the Fourth Proportional to 517.15, 713.97 and 320.93

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Solution

The fourth proportional to 517.15, 713.97 and 320.93 is: 443.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.15 : 713.97 = 320.93 : x
  2. Step 2: Convert to fraction form
    517.15/713.97 = 320.93/x
  3. Step 3: Cross multiply
    517.15x = 713.97 × 320.93
  4. Step 4: Simplify right side
    517.15x = 229,134.39
  5. Step 5: Solve for x
    x = 229,134.39/517.15
  6. Step 6: Final answer
    x = 443.07

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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.