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Finding the Fourth Proportional to 479.91, 718.20 and 371.91

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Solution

The fourth proportional to 479.91, 718.20 and 371.91 is: 556.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.91 : 718.20 = 371.91 : x
  2. Step 2: Convert to fraction form
    479.91/718.20 = 371.91/x
  3. Step 3: Cross multiply
    479.91x = 718.20 × 371.91
  4. Step 4: Simplify right side
    479.91x = 267,105.76
  5. Step 5: Solve for x
    x = 267,105.76/479.91
  6. Step 6: Final answer
    x = 556.57

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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.