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Finding the Fourth Proportional to 520.92, 719.55 and 395.82

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Solution

The fourth proportional to 520.92, 719.55 and 395.82 is: 546.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.92 : 719.55 = 395.82 : x
  2. Step 2: Convert to fraction form
    520.92/719.55 = 395.82/x
  3. Step 3: Cross multiply
    520.92x = 719.55 × 395.82
  4. Step 4: Simplify right side
    520.92x = 284,812.28
  5. Step 5: Solve for x
    x = 284,812.28/520.92
  6. Step 6: Final answer
    x = 546.75

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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.