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Finding the Fourth Proportional to 520.53, 717.50 and 380.65

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Solution

The fourth proportional to 520.53, 717.50 and 380.65 is: 524.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.53 : 717.50 = 380.65 : x
  2. Step 2: Convert to fraction form
    520.53/717.50 = 380.65/x
  3. Step 3: Cross multiply
    520.53x = 717.50 × 380.65
  4. Step 4: Simplify right side
    520.53x = 273,116.38
  5. Step 5: Solve for x
    x = 273,116.38/520.53
  6. Step 6: Final answer
    x = 524.69

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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.