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Finding the Fourth Proportional to 479.35, 718.56 and 205.51

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Solution

The fourth proportional to 479.35, 718.56 and 205.51 is: 308.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.35 : 718.56 = 205.51 : x
  2. Step 2: Convert to fraction form
    479.35/718.56 = 205.51/x
  3. Step 3: Cross multiply
    479.35x = 718.56 × 205.51
  4. Step 4: Simplify right side
    479.35x = 147,671.27
  5. Step 5: Solve for x
    x = 147,671.27/479.35
  6. Step 6: Final answer
    x = 308.07

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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.