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Finding the Fourth Proportional to 506.72, 760.19 and 287.45

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Solution

The fourth proportional to 506.72, 760.19 and 287.45 is: 431.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.72 : 760.19 = 287.45 : x
  2. Step 2: Convert to fraction form
    506.72/760.19 = 287.45/x
  3. Step 3: Cross multiply
    506.72x = 760.19 × 287.45
  4. Step 4: Simplify right side
    506.72x = 218,516.62
  5. Step 5: Solve for x
    x = 218,516.62/506.72
  6. Step 6: Final answer
    x = 431.24

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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.