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Finding the Fourth Proportional to 519.55, 717.02 and 388.33

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Solution

The fourth proportional to 519.55, 717.02 and 388.33 is: 535.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.55 : 717.02 = 388.33 : x
  2. Step 2: Convert to fraction form
    519.55/717.02 = 388.33/x
  3. Step 3: Cross multiply
    519.55x = 717.02 × 388.33
  4. Step 4: Simplify right side
    519.55x = 278,440.38
  5. Step 5: Solve for x
    x = 278,440.38/519.55
  6. Step 6: Final answer
    x = 535.93

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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.