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Finding the Fourth Proportional to 417, 626.85 and 386.94

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Solution

The fourth proportional to 417, 626.85 and 386.94 is: 581.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    417 : 626.85 = 386.94 : x
  2. Step 2: Convert to fraction form
    417/626.85 = 386.94/x
  3. Step 3: Cross multiply
    417x = 626.85 × 386.94
  4. Step 4: Simplify right side
    417x = 242,553.34
  5. Step 5: Solve for x
    x = 242,553.34/417
  6. Step 6: Final answer
    x = 581.66

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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.