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Finding the Fourth Proportional to 479.74, 718.38 and 316.92

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Solution

The fourth proportional to 479.74, 718.38 and 316.92 is: 474.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.74 : 718.38 = 316.92 : x
  2. Step 2: Convert to fraction form
    479.74/718.38 = 316.92/x
  3. Step 3: Cross multiply
    479.74x = 718.38 × 316.92
  4. Step 4: Simplify right side
    479.74x = 227,668.99
  5. Step 5: Solve for x
    x = 227,668.99/479.74
  6. Step 6: Final answer
    x = 474.57

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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.