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Finding the Fourth Proportional to 479.21, 718.83 and 154.58

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Solution

The fourth proportional to 479.21, 718.83 and 154.58 is: 231.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.21 : 718.83 = 154.58 : x
  2. Step 2: Convert to fraction form
    479.21/718.83 = 154.58/x
  3. Step 3: Cross multiply
    479.21x = 718.83 × 154.58
  4. Step 4: Simplify right side
    479.21x = 111,116.74
  5. Step 5: Solve for x
    x = 111,116.74/479.21
  6. Step 6: Final answer
    x = 231.87

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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.