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Finding the Fourth Proportional to 517.65, 713.50 and 377.65

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Solution

The fourth proportional to 517.65, 713.50 and 377.65 is: 520.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.65 : 713.50 = 377.65 : x
  2. Step 2: Convert to fraction form
    517.65/713.50 = 377.65/x
  3. Step 3: Cross multiply
    517.65x = 713.50 × 377.65
  4. Step 4: Simplify right side
    517.65x = 269,453.28
  5. Step 5: Solve for x
    x = 269,453.28/517.65
  6. Step 6: Final answer
    x = 520.53

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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.