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Finding the Fourth Proportional to 451.91, 622.70 and 346.99

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Solution

The fourth proportional to 451.91, 622.70 and 346.99 is: 478.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.91 : 622.70 = 346.99 : x
  2. Step 2: Convert to fraction form
    451.91/622.70 = 346.99/x
  3. Step 3: Cross multiply
    451.91x = 622.70 × 346.99
  4. Step 4: Simplify right side
    451.91x = 216,067.38
  5. Step 5: Solve for x
    x = 216,067.38/451.91
  6. Step 6: Final answer
    x = 478.13

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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.