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Finding the Fourth Proportional to 418.41, 576.95 and 305.87

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Solution

The fourth proportional to 418.41, 576.95 and 305.87 is: 421.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.41 : 576.95 = 305.87 : x
  2. Step 2: Convert to fraction form
    418.41/576.95 = 305.87/x
  3. Step 3: Cross multiply
    418.41x = 576.95 × 305.87
  4. Step 4: Simplify right side
    418.41x = 176,467.28
  5. Step 5: Solve for x
    x = 176,467.28/418.41
  6. Step 6: Final answer
    x = 421.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.