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Finding the Fourth Proportional to 479.20, 718.80 and 154.79

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Solution

The fourth proportional to 479.20, 718.80 and 154.79 is: 232.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.20 : 718.80 = 154.79 : x
  2. Step 2: Convert to fraction form
    479.20/718.80 = 154.79/x
  3. Step 3: Cross multiply
    479.20x = 718.80 × 154.79
  4. Step 4: Simplify right side
    479.20x = 111,263.05
  5. Step 5: Solve for x
    x = 111,263.05/479.20
  6. Step 6: Final answer
    x = 232.19

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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.