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Finding the Fourth Proportional to 622.53, 935.55 and 418.50

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Solution

The fourth proportional to 622.53, 935.55 and 418.50 is: 628.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.53 : 935.55 = 418.50 : x
  2. Step 2: Convert to fraction form
    622.53/935.55 = 418.50/x
  3. Step 3: Cross multiply
    622.53x = 935.55 × 418.50
  4. Step 4: Simplify right side
    622.53x = 391,527.68
  5. Step 5: Solve for x
    x = 391,527.68/622.53
  6. Step 6: Final answer
    x = 628.93

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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.