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Finding the Fourth Proportional to 523.79, 785.69 and 380.42

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Solution

The fourth proportional to 523.79, 785.69 and 380.42 is: 570.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.79 : 785.69 = 380.42 : x
  2. Step 2: Convert to fraction form
    523.79/785.69 = 380.42/x
  3. Step 3: Cross multiply
    523.79x = 785.69 × 380.42
  4. Step 4: Simplify right side
    523.79x = 298,890.29
  5. Step 5: Solve for x
    x = 298,890.29/523.79
  6. Step 6: Final answer
    x = 570.63

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Similar ratio
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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.