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Finding the Fourth Proportional to 519.73, 780.10 and 288.88

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Solution

The fourth proportional to 519.73, 780.10 and 288.88 is: 433.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.73 : 780.10 = 288.88 : x
  2. Step 2: Convert to fraction form
    519.73/780.10 = 288.88/x
  3. Step 3: Cross multiply
    519.73x = 780.10 × 288.88
  4. Step 4: Simplify right side
    519.73x = 225,352.62
  5. Step 5: Solve for x
    x = 225,352.62/519.73
  6. Step 6: Final answer
    x = 433.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.