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Finding the Fourth Proportional to 519.64, 780.92 and 484.54

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Solution

The fourth proportional to 519.64, 780.92 and 484.54 is: 728.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.64 : 780.92 = 484.54 : x
  2. Step 2: Convert to fraction form
    519.64/780.92 = 484.54/x
  3. Step 3: Cross multiply
    519.64x = 780.92 × 484.54
  4. Step 4: Simplify right side
    519.64x = 378,386.98
  5. Step 5: Solve for x
    x = 378,386.98/519.64
  6. Step 6: Final answer
    x = 728.17

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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.