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Finding the Fourth Proportional to 417.99, 622.75 and 397.34

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Solution

The fourth proportional to 417.99, 622.75 and 397.34 is: 591.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.99 : 622.75 = 397.34 : x
  2. Step 2: Convert to fraction form
    417.99/622.75 = 397.34/x
  3. Step 3: Cross multiply
    417.99x = 622.75 × 397.34
  4. Step 4: Simplify right side
    417.99x = 247,439.38
  5. Step 5: Solve for x
    x = 247,439.38/417.99
  6. Step 6: Final answer
    x = 591.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.