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Finding the Fourth Proportional to 479.70, 662.20 and 369.13

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Solution

The fourth proportional to 479.70, 662.20 and 369.13 is: 509.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.70 : 662.20 = 369.13 : x
  2. Step 2: Convert to fraction form
    479.70/662.20 = 369.13/x
  3. Step 3: Cross multiply
    479.70x = 662.20 × 369.13
  4. Step 4: Simplify right side
    479.70x = 244,437.89
  5. Step 5: Solve for x
    x = 244,437.89/479.70
  6. Step 6: Final answer
    x = 509.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.