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Finding the Fourth Proportional to 479.83, 720.54 and 263.56

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Solution

The fourth proportional to 479.83, 720.54 and 263.56 is: 395.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.83 : 720.54 = 263.56 : x
  2. Step 2: Convert to fraction form
    479.83/720.54 = 263.56/x
  3. Step 3: Cross multiply
    479.83x = 720.54 × 263.56
  4. Step 4: Simplify right side
    479.83x = 189,905.52
  5. Step 5: Solve for x
    x = 189,905.52/479.83
  6. Step 6: Final answer
    x = 395.78

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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.