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Finding the Fourth Proportional to 519.93, 717.54 and 287.07

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Solution

The fourth proportional to 519.93, 717.54 and 287.07 is: 396.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.93 : 717.54 = 287.07 : x
  2. Step 2: Convert to fraction form
    519.93/717.54 = 287.07/x
  3. Step 3: Cross multiply
    519.93x = 717.54 × 287.07
  4. Step 4: Simplify right side
    519.93x = 205,984.21
  5. Step 5: Solve for x
    x = 205,984.21/519.93
  6. Step 6: Final answer
    x = 396.18

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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.