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Finding the Fourth Proportional to 479.13, 718.77 and 205.20

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Solution

The fourth proportional to 479.13, 718.77 and 205.20 is: 307.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.13 : 718.77 = 205.20 : x
  2. Step 2: Convert to fraction form
    479.13/718.77 = 205.20/x
  3. Step 3: Cross multiply
    479.13x = 718.77 × 205.20
  4. Step 4: Simplify right side
    479.13x = 147,491.60
  5. Step 5: Solve for x
    x = 147,491.60/479.13
  6. Step 6: Final answer
    x = 307.83

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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.