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Finding the Fourth Proportional to 640.70, 884.32 and 454.22

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Solution

The fourth proportional to 640.70, 884.32 and 454.22 is: 626.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.70 : 884.32 = 454.22 : x
  2. Step 2: Convert to fraction form
    640.70/884.32 = 454.22/x
  3. Step 3: Cross multiply
    640.70x = 884.32 × 454.22
  4. Step 4: Simplify right side
    640.70x = 401,675.83
  5. Step 5: Solve for x
    x = 401,675.83/640.70
  6. Step 6: Final answer
    x = 626.93

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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.