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Finding the Fourth Proportional to 640.04, 958.94 and 456.49

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Solution

The fourth proportional to 640.04, 958.94 and 456.49 is: 683.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.04 : 958.94 = 456.49 : x
  2. Step 2: Convert to fraction form
    640.04/958.94 = 456.49/x
  3. Step 3: Cross multiply
    640.04x = 958.94 × 456.49
  4. Step 4: Simplify right side
    640.04x = 437,739.44
  5. Step 5: Solve for x
    x = 437,739.44/640.04
  6. Step 6: Final answer
    x = 683.93

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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.