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Finding the Fourth Proportional to 520.14, 717.66 and 354.54

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Solution

The fourth proportional to 520.14, 717.66 and 354.54 is: 489.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.14 : 717.66 = 354.54 : x
  2. Step 2: Convert to fraction form
    520.14/717.66 = 354.54/x
  3. Step 3: Cross multiply
    520.14x = 717.66 × 354.54
  4. Step 4: Simplify right side
    520.14x = 254,439.18
  5. Step 5: Solve for x
    x = 254,439.18/520.14
  6. Step 6: Final answer
    x = 489.17

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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.