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Finding the Fourth Proportional to 479.40, 717.27 and 263.13

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Solution

The fourth proportional to 479.40, 717.27 and 263.13 is: 393.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.40 : 717.27 = 263.13 : x
  2. Step 2: Convert to fraction form
    479.40/717.27 = 263.13/x
  3. Step 3: Cross multiply
    479.40x = 717.27 × 263.13
  4. Step 4: Simplify right side
    479.40x = 188,735.26
  5. Step 5: Solve for x
    x = 188,735.26/479.40
  6. Step 6: Final answer
    x = 393.69

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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.