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Finding the Fourth Proportional to 479.82, 665.62 and 455.22

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Solution

The fourth proportional to 479.82, 665.62 and 455.22 is: 631.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.82 : 665.62 = 455.22 : x
  2. Step 2: Convert to fraction form
    479.82/665.62 = 455.22/x
  3. Step 3: Cross multiply
    479.82x = 665.62 × 455.22
  4. Step 4: Simplify right side
    479.82x = 303,002.40
  5. Step 5: Solve for x
    x = 303,002.40/479.82
  6. Step 6: Final answer
    x = 631.49

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.