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Finding the Fourth Proportional to 519.99, 717.60 and 298.87

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Solution

The fourth proportional to 519.99, 717.60 and 298.87 is: 412.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.99 : 717.60 = 298.87 : x
  2. Step 2: Convert to fraction form
    519.99/717.60 = 298.87/x
  3. Step 3: Cross multiply
    519.99x = 717.60 × 298.87
  4. Step 4: Simplify right side
    519.99x = 214,469.11
  5. Step 5: Solve for x
    x = 214,469.11/519.99
  6. Step 6: Final answer
    x = 412.45

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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.