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Finding the Fourth Proportional to 479.58, 662.04 and 339.81

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Solution

The fourth proportional to 479.58, 662.04 and 339.81 is: 469.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.58 : 662.04 = 339.81 : x
  2. Step 2: Convert to fraction form
    479.58/662.04 = 339.81/x
  3. Step 3: Cross multiply
    479.58x = 662.04 × 339.81
  4. Step 4: Simplify right side
    479.58x = 224,967.81
  5. Step 5: Solve for x
    x = 224,967.81/479.58
  6. Step 6: Final answer
    x = 469.09

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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.